Top 35 Structural Design & Engineering Companies for Architectural Services in the US

Structural design services are not simply about steel beams and calculation of loads—it’s the behind-the-scenes brilliance that goes into every breathtaking skyline, defying gravity bridge, and earthquake-proof wonder. Behind each of those architectural masterpieces are the engineering companies that translate pen-and-paper sketches into rock-solid, secure, and breathtaking reality.

Say you’re designing a shiny new office high-rise, rehabilitating an aging stadium, or constructing the framework of a future-smart city. The proper structural engineering ally can be the difference-maker. This is not a dry roster of companies—it’s your open-access ticket to 35 of the top structural design and engineering firms in the United States. Cad Crowd has years of experience in providing top-notch freelance talent to architectural design and construction firms, and in this article, let’s dive into the names of building America’s built environment!

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Bechtel Corporation

Bechtel Corporation has been shaping skylines and infrastructure around the globe since 1898. Known for taking on the kinds of colossal engineering challenges that most companies wouldn’t dare touch, Bechtel leads the pack in everything from nuclear power facilities to massive mining operations and transportation networks that span continents.

With more than 50,000 workers on its payroll, it’s no wonder Bechtel is perennially ranked as the #1 U.S. contractor by Engineering News-Record. Its legacy is one of ambition, precision, and unapologetic boldness in constructing the world’s most critical—and sometimes most complicated—structures. When it’s big engineering, Bechtel leads the way.

Website: Bechtel.com

Skidmore, Owings & Merrill (SOM)

When it comes to defying gravity with panache, Skidmore, Owings & Merrill (SOM) is in a class of its own. Their mark is on some of the world’s most legendary skyscrapers, from the towering spire of the Burj Khalifa to the steadfast strength of One World Trade Center. What distinguishes SOM isn’t merely size—it’s the structural sorcery behind the scenes.

Their first-of-a-kind implementation of the buttressed core system, for example, redefines what is possible in supertall engineering. When architectural design experts and engineers are confronted by the labyrinth of issues in contemporary supertall design, SOM is often not only on board—SOM is setting the world standard.

Website: SOM.com

HNTB Corporation

Kansas City-based HNTB Corporation has built a legendary reputation as the mastermind behind some of the country’s most iconic infrastructure. Their fingerprints are all over major stadiums and transportation hubs, including the sleek Levi’s Stadium in California and the jaw-dropping Allegiant Stadium in Las Vegas.

These aren’t just buildings—they’re modern marvels that reflect innovation, precision, and a flair for creating unforgettable public spaces. It’s no wonder HNTB continues to rack up accolades. With a rich talent bench and commitment to bold design, this company is a standout among engineering and architectural greats.

Website: https://www.hntb.com/

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Burns & McDonnell

Burns & McDonnell, based proudly in Kansas City and wholly employee-owned, has earned a reputation for solving some of the most daunting engineering challenges on the planet. With close to $7 billion in revenue annually, this behemoth company isn’t just big – they’re diverse.

Their engineering design services and consultants tackle projects across markets from aviation and power to water facilities and environmental solutions. That wide range of experience enables them to provide tailored solutions to address the changing demands of contemporary cities and industries. Being employee-owned provides an added layer of commitment—everybody has skin in the game, and it manifests in the outcomes they produce, project by project.

Website: BurnsMCD.com

HDR, Inc.

Established way back in 1917, HDR, Inc. is today a giant in infrastructure and environmental engineering. With its talented team of more than 12,000 engineers, architects, and technicians, HDR does not merely construct — it invents. Whether it’s managing intricate water issues, designing smarter energy solutions, or creating resilient communities, HDR applies innovative thinking and technical know-how to each project. Their heritage is over a century old, yet their thinking is forward-looking. From neighborhood communities to worldwide influence, HDR stays at the forefront of creating resilient, effective, and innovative solutions that transform the way people live, move, and prosper.

Website: https://www.hdrinc.com

CDM Smith

Hidden within Boston’s historic downtown, CDM Smith is not just another engineering company—it’s a force in water, transportation, and environmental infrastructure. What makes them different? First, they’re employee-owned, which means everyone’s got a stake in getting it right. This synergy ignites innovation on every project, from protecting water sources to transforming highways. And it’s more than just hype—CDM Smith regularly places at the top of the highly regarded ENR Top 500 Design Firms list. With a name for intelligent design and sustainability, they’re building a better future from the ground up—one innovative, forward-looking solution at a time.

Website: https://www.cdmsmith.com/en/

Magnusson Klemencic Associates (MKA)

Magnusson Klemencic Associates, or MKA, is a Seattle structural engineering giant with a résumé that’s more like a skyline. Their structures hold up some of the world’s most recognizable towers, from the World Trade Center to the Salesforce Tower.

With decades of engineering history under their belt, MKA has established an international reputation for innovative, durable engineering design services. Whether taking on sophisticated urban initiatives or pushing what’s possible in vertical building, this company doesn’t simply play by the rules—it creates them. Their influence extends far into the Pacific Northwest and resonates globally, shaping cities with vision and unshakeable engineering. MKA keeps reaching higher, literally and figuratively.

Website: https://www.mka.com/

Jacobs Solutions Inc.

Jacobs Solutions Inc. has made a powerhouse name for itself across sectors, from aerospace skies to concrete building blocks of large civil infrastructure. Famed for providing end-to-end engineering services with the highest level of seamlessness, Jacobs is more than just a familiar name on the ENR lists—it’s a regular at the top.

Their track record demonstrates a special combination of technical ingenuity and practicality in the field, tackling high-tech defense systems to smart transportation systems. Whether it’s a moonshot project or a city transformation, Jacobs brings precision, scale, and an acute sense of what it takes to create the future. It’s engineering on a different level altogether.

Website: https://www.jacobs.com/

AECOM

AECOM is a global leader in the architecture, engineering, and construction space. Reputed to tackle anything from massive transportation systems to multifaceted environmental issues, the company always appears high on the Engineering News-Record (ENR) rankings.

Whether it’s crafting skylines or revitalizing ecosystems, AECOM’s influence crosses continents, providing intelligent, sustainable solutions that reshape daily life. They do more than just conventional structural engineering services; they delve into infrastructure innovation, urban planning, and even disaster response. With eyes on the future and feet rooted in technical expertise, AECOM keeps pushing what’s possible in the world.

Website: https://aecom.com/

Tetra Tech

Tetra Tech is not merely another player in the game of structural engineering—it’s a multidisciplinary powerhouse. Whether the challenge is aviation infrastructure or hydrology-led site development, this company delivers profound capability. Renowned for handling complicated, non-residential buildings with ease, Tetra Tech regularly occupies the top ranks on the ENR lists.

Their consultants and engineers perform across industries, delivering intelligent solutions to difficult engineering challenges. From idea to delivery, they’re transforming skylines, modernizing airports, and redefining where infrastructure and innovation intersect. For customers who demand precision and dependability, Tetra Tech is a name that delivers consistently, every time.

Website: https://www.tetratech.com/

Fluor Corporation

Fluor Corporation ranks high among the globe’s strongest forces in construction and engineering. Renowned for taking on enormous, intricate projects in energy, infrastructure, and petrochemicals, this global leader lays claim to experience that turns dreams into realities.

From oil refineries to power stations and highways to high-tech centers, Fluor gets the job done with precision and magnitude. It’s not construction—it’s having command of every stage of project creation, from idea to delivery. With a portfolio filled with mega-projects and a history of innovation, Fluor continues to build skylines and power industries worldwide.

Website: https://www.fluor.com

Kiewit Corporation

Kiewit Corporation is one of Omaha’s finest engineering and construction giants. Celebrated for its heavy civil, mining, and industrial design service project expertise, the company regularly brings to life stunning infrastructure in North America. But bulldozers and blueprints aren’t the only thing on its mind—Kiewit is just as dedicated to people.

With a commitment to providing an exceptional work-life balance, workers get to do the meaningful work that matters without losing personal time. That elusive combination of technical acumen and employee health makes Kiewit stand out. It’s the type of company where integrity and innovation go together, and where great projects are built side by side with great lives.

Website: https://www.kiewit.com/

Parsons Corporation

Pasadena-based Parsons Corporation is not your typical engineering company—it’s where innovation and responsibility converge. Famous for working on huge infrastructure and environmental issues, Parsons offers an unusual combination of sustainability, high-tech engineering expertise, and defense intelligence.

Whether it’s creating green-infused transit systems or bolstering national security infrastructure, the firm’s influence cuts across industries and geographies. Its projects don’t only address today’s challenges—they future-proof communities. With a keen focus on sustainability and resilient design, Parsons is reimagining how the world constructs, safeguards, and flourishes. It’s engineering with intention, where forward motion converges with protection in every design.

Website: https://www.parsons.com/

Stantec Inc.

Stantec Inc. has expanded into a hub of innovation and community influence, with over 25,000 professionals designing spaces in the U.S., Canada, and globally. Praised for merging architectural design services, infrastructure, and green design effortlessly, this firm doesn’t merely construct buildings—it constructs improved futures.

From transforming city centers to designing intelligent water systems and creating resilient schools, Stantec brings a human-centered approach to each endeavor. Their international reach is staggering, but it’s their hometown feel and dedication to the community that makes them really stand out. Whether a bridge, a hospital, or a neighborhood plan, Stantec is building the world with purpose.

Website: https://www.stantec.com/en

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WSP (formerly Louis Berger/Ammann & Whitney)

WSP, formerly known through its names Louis Berger and Ammann & Whitney, has become a force to be reckoned with in global engineering. With roots running deep in legacy transit and bridge design, the company comes to the table with decades of experience that was first defined by groundbreaking work from its legacy firms. WSP now works on everything from sprawling transit systems to sophisticated infrastructure, combining innovation with proven engineering know-how.

That long history with iconic bridges and transformative transit projects isn’t just part of their past—it’s the foundation of the smart, sustainable solutions they deliver around the world today, all with a future-focused, multidisciplinary approach.

Website: https://www.wsp.com

Langan

When it comes to complex foundations, environmental challenges, or transportation infrastructure, Langan brings serious expertise to the table. Renowned for its expertise in geotechnical, environmental, and transportation structural solutions, this company regularly finds itself on the list of leading names in nonresidential building and construction drawing design services.

Clients have faith in Langan to manage everything from challenging ground conditions to sensitive, environmentally compromised sites with accuracy and attention. Its capacity to combine technical innovation with practical, buildable strategies has led it to be a first-choice collaborator for developers and architects alike. Whether it’s a skyscraper or a highway, Langan’s structural vision keeps big projects on the ground—literally and figuratively.

Website: https://www.langan.com/

IMEG Corp.

IMEG Corp. puts engineering on display—literally. With expertise in mechanical, electrical, plumbing, and structural consulting, this innovative company helps drive the vital infrastructure behind hospitals, biotech research facilities, and high-tech campuses.

They don’t provide engineering services; they implement fully integrated solutions for innovation-based industries. Whether they’re energizing leading-edge medical centers or powering up advanced research labs, IMEG Corp. has established a position where reliability, performance, and accuracy are most critical. Through a teamwork approach and extensive industry knowledge, they repeatedly translate complicated imaginings into tangible functionality—designing smarter, stronger, and more resilient environments from the ground up.

Website: https://imegcorp.com/

Altieri

Altieri, known for its innovative building systems design and high-profile experience on projects such as the Obama Presidential Center and a number of the nation’s highest-profile museums, has made a daring move to propel its next phase. The company recently relocated its headquarters to advance greater collaboration between teams and increase its ability to innovate.

Known for marrying technical excellence with cultural significance, Altieri’s relocation isn’t just about a new address—it’s about creating an environment that matches the ambition of its projects. With a sharper focus on creative synergy, the company is gearing up to tackle even more transformative architectural challenges for architectural design and drafting firms.

Website: https://www.altieri.llc/

Steven Winter Associates

Since 1972, Steven Winter Associates has been on a mission to reshape how buildings function in New York City and beyond. With deep roots in sustainability, this firm isn’t just designing spaces—it’s rethinking the entire way we live, work, and use energy.

Their legacy is built on decades of experience in green building, and they’ve earned recognition for leading the charge in energy-efficient and sustainable certifications. Whether it’s retrofitting existing buildings for efficiency or designing new projects to LEED and Passive House standards, Steven Winter Associates is where innovation and environmental stewardship meet—smart, sustainable solution by smart, sustainable solution.

Website: https://www.swinter.com/

McLaren Engineering Group

McLaren Engineering Group is not the largest name on the New York skyline, but its influence on structural design can’t be avoided. This mid-scale giant consistently provides daring, forward-thinking solutions for public and institutional environments—from bridges and cultural institutions to state-of-the-art marine facilities.

Wth a reputation for not shying away from difficult problems, McLaren has gained recognition on both the state and national fronts. Their portfolio is evidence of visionary design engineering services and an uncompromising commitment to safety, beauty, and function. Clients rely on McLaren to combine creativity with accuracy—and that’s precisely what keeps them one step ahead in the structural game.

Website: https://www.mgmclaren.com

Sam Schwartz Company

Sam Schwartz Company is not only designing skylines—they’re reforming the way cities function. Recognized for their long-standing knowledge of structural and transport engineering, this company takes a leading role in redefining urban environments.

In New York City, they have played a key role in projects that combine transit design with sustainability, building wiser, greener systems of mobility. Their process is more than technical expertise; it’s about building a greater city life for the people who live and work there. Whether it’s optimizing traffic flow or designing pedestrian-friendly environments, Sam Schwartz Company demonstrates that great engineering can mean an even more livable, breathable, and efficient city.

Website: https://ssptms.com/

Murray Engineering

Murray Engineering excels in the fast-paced world of New York City architecture for one reason—it prioritizes people. This boutique company is run by a proactive founder with a personal approach to each and every project, with no single detail falling through the cracks.

As much at home bringing out the best in old buildings as introducing sleek new commercial design, Murray Engineering is the only firm that consistently manages to blend the new and the old. Whether breathing new life into a century-old brownstone or designing the sleek bones of a contemporary office tower, the firm’s trademark is considered bespoke engineering design experts that elevates each building it touches discreetly.

Website: https://murray-engineering.com/

De Nardis Engineering

De Nardis Engineering has established its reputation by designing some of the most vibrant civic and commercial spaces in the nation. From colossal stadiums that ring out with the roar of thousands to state-of-the-art learning centers designed for learning tomorrow and airports designed for efficiency and movement, they do it all with precision and panache.

Their strength is in dealing with complexity without ever forgetting the human touch. Whether the job requires grand infrastructure or fine detail, De Nardis Engineering brings innovation, dependability, and extensive industry experience to each challenge, making them an exceptional partner in the structural design community.

Website: https://www.denardis.com/

Adept Engineering Solutions

Hidden away in Schaumburg, IL, Adept Engineering Solutions is a midsize company creating huge ripples in the realm of structural engineering design experts. Renowned for its incisive problem-solving strategy and reliable consultancy expertise, this group of engineers has established itself as a master at breaking down intricate structural issues into innovative, safe, and economical solutions.

From working together with architects on a revolutionary commercial facility to restoring the integrity of existing buildings, Adept provides precision along with imagination. With a passion for quality and attention to detail, they’ve become a go-to partner for structural engineering in Illinois and all over the world.

Website: https://www.adeptengr.com/

Alpha Structural, Inc.

Alpha Structural, Inc. is the one to call in Los Angeles for anything structural. They’re not a jack-of-all-trades company doing a little bit of everything—they only do structural work, and they excel at it. From hillside foundations to seismic retrofits, their craftsmanship is embedded in the very fabric of Southern California buildings.

What distinguishes them is their intimate knowledge of the region’s unique topography and building codes. That local expertise translates into dependable, high-quality solutions for residential and commercial projects alike. When buildings in L.A. must be strengthened and stabilized, Alpha Structural responds with precision and pride.

Website: https://www.alphastructural.com

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BIMPRO LLC

BIMPRO LLC in Pflugerville, Texas, is a committed structural engineering company that’s precision and efficiency-oriented. This 100% structural company excels at Building Information Modeling (BIM) with the perfect fusion of technical precision and up-to-date design software.

They’ve established a good reputation on small-to-mid-sized projects where close attention to detail is actually crucial. Clients love their efficient approach and thorough knowledge base, making every partnership a smooth and productive ride. For dependable structural engineering with intelligent BIM integration services, BIMPRO is the brand regional architects and developers turn to over and over.

Website: https://www.bimprous.com

Pond / Kimley-Horn / Jacobs / AECOM (Atlanta)

Within Atlanta, a cluster of titans of structural design companies is transforming the city’s skyline. Pond, Kimley-Horn, Jacobs, and AECOM take the lead with an impressive presence in the market. These firms don’t just handle everyday structures—they’ve become the go-to names for high-volume, high-impact projects, including eye-catching “bullring”-style arenas that demand innovation and scale. Their combined influence has turned Atlanta into a structural design hub where ambitious architecture meets world-class engineering. With each new development, this elite group continues to redefine what’s possible in the city’s built environment.

Wood / O’Donnell & Naccarato

Wood / O’Donnell & Naccarato is an energetic Miami-based firm that’s disrupting the structural design landscape. Focused on mid-to-large structural systems, they integrate architecture with civil engineering to craft daring, durable spaces. Their designs are not only technologically solid but also sensitively integrated into the surrounding environment.

Whether a commercial high-rise or a public building, their work embodies attention to both form and function. With Miami’s skyline as their canvas, this team continues to leave a lasting structural mark—strong, smart, and ready for the future.

Website: https://www.o-n.com/

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Milhouse Engineering & Construction

Milhouse Engineering & Construction stands out in Chicago as a dynamic hybrid firm that blends top-tier structural engineering, such as with structural drafting experts, with full-scale construction services. This unique combination makes it a go-to choice for projects that demand speed without compromising quality. Whether it’s a business center or infrastructure development, Milhouse contributes both brains and brawn to the equation.

Their hybrid method centralizes workflows, minimizes delays, and keeps all participants on the same wavelength from the initial design concept to completion. It’s an intelligent solution for anyone operating against the clock.

Website: https://milhouseinc.com/

Uppteam

Uppteam at Ormond Beach introduces a new, solution-based approach to structural engineering. Renowned for deep expertise and a team-first approach, they offer 30–50% structural engineering services designed expressly for commercial builders. This results in wiser planning, fewer surprises, and efficient project delivery from beginning to end. Uppteam isn’t only about the numbers—they’re about innovative problem-solving and assisting builders in transforming grand visions into robust structures. No matter if it’s a tough site or a short timeline, Uppteam collaborates with clients to discover solutions that get the job done—rapidly, realistically, and with accuracy along the way.

Website: https://www.uppteam.com/

Tangent Design & Engineering

Tangent Design & Engineering of Rocklin, CA, combines architectural creativity with proven structural expertise, crafting spaces that are both lovely and lasting. Proficient in commercial drafting and design services and institutional building design throughout the region, this two-discipline studio excels at creating spaces that fulfill function and form.

Its team excels where creativity meets engineering, creating considerate, effective buildings that address the practical realities of communities and clients. From the clean lines of office space to the mission-driven public facility, Tangent applies vision and accuracy to each project.

Website: https://www.tangentde.com/

Texas Piers Consulting LLC

Texas Piers Consulting LLC of Katy, TX, is a first-stop expert for pier and foundation structural engineering. With an acute eye on geotechnical and structural systems, this company lends in-depth technical expertise to each project. From supporting custom residences to stabilizing intricate commercial constructions, they specialize in the development of trustworthy, ground-up solutions that stand the test of time.

Their reputation is founded upon accuracy, problem-solving, and a thorough awareness of the soil issues of Texas. When structural integrity is an issue, Texas Piers Consulting provides the expertise that doesn’t just make foundations strong—but smart.

Website: https://www.texaspiersconsulting.com

Thompson Pipe Group

Thompson Pipe Group, located in Alvarado, Texas, is a national leader in pipeline and structural engineering, such as structural steel detailing services. Their contributions extend well beyond mere pipe supply—they’re an integral driving force on infrastructure projects nationwide, particularly in the oil and energy industries. From giant water transport networks to intricate structural elements, they apply technical strength and dependability to each project.

Recognized for precision engineering and durability over the long haul, Thompson Pipe Group helps power America from the ground up, constructing the unseen but vital veins of current infrastructure. Their reach is extensive, and their influence is even more so.

Website: https://thompsonpipegroup.com/

Black & Veatch

Black & Veatch is a worldwide leader in energy, water, and telecoms, but it’s their brawn in structural and civil projects that truly makes an impression. From enormous infrastructure schemes to streamlined, sustainable solutions, they bring heavy-duty engineering credentials to the game.

Whether it’s creating durable water systems or backing up complex energy plants, their structural and civil engineering skills shape skylines and communities around the globe. With decades of experience and a forward-thinking mindset, Black & Veatch is not only constructing projects—they’re constructing what’s next in global infrastructure.

Houston-based RS&H has established a strong reputation in aviation structures, defense work, and commercial engineering. Hailed as one of the “25 Best Civil Engineering Firms,” RS&H combines innovation with technical skill.

From developing sophisticated airport infrastructure to solving challenging defense facilities, RS&H delivers with precision and explicit attention to real-world functionality. Their forward-thinking methodology is trusted by clients in every industry. With roots deep in engineering and a forward-thinking perspective, RS&H continues to set the bar higher for what excellent civil engineering can do in challenging, high-impact markets.

Website: https://www.bv.com/

Why these companies excel

• Scale & reach – Industry leaders like Bechtel, AECOM, Jacobs, and Fluor operate in hundreds of nations and on megaprograms.
• Specialist niche leadership – Companies like De Nardis (stadiums), Texas Piers (foundations), or Sam Schwartz (transport coupled structures) provide hyper-specialized service.
• Sustainability & collaboration – Steve Winter’s energy-smart structures and Altieri’s award-winning green systems continue raising the bar.
• Growing midmarket strength – Regional firms (Alpha Structural, BIMPRO, Tangent) deliver hands-on, efficient structural design customized to local needs.
• Holistic integration – Turner’s engineering construction combos give clients unified service and a single point of accountability.

What to check when selecting a firm

• Specialization & project type – Align an architectural planning and design firm‘s portfolio with your requirements (high-rise vs. bridge vs. PV foundations).
• Size & capacity – Large firms are ideal for multi-billion projects; boutique firms provide flexibility and hands-on service.
• Technical innovation – If your project is on the cutting edge, weigh firms with established R&D and award histories.
• Collaboration style – Culture counts: Some companies get tightly aligned with architects and owners, and others take the lead.
• Sustainability credentials – Increased demand for green structural design equates to due diligence on a firm’s environmental expertise.

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Final thoughts

From the world giants constructing skylines to specialized masters designing strong foundations, these 35 companies are structural design leaders throughout America. No matter what your dreams are—super tall towers or community-scale structures—you’ll find a company here with the vision and resources to make it happen.

Cad Crowd is the world’s leading platform for freelance architectural design, engineering, and product design services. If you’d like more in-depth information—profiles, project spotlights, or geographic segmentation—just let us know and we’ll be able to provide a free quote!