Chesterfield S.
Mechanical design engineer with extensive 3D CAD experience.
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Bolted Connections
Mechanical Engineering
Mechanical Engineering Calculations
Pipe Routing
Vacuum Technology Engineering
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About
• 16 Years of full-time, professional experience as a mechanical engineer.
• Proficiency with Onshape, SolidWorks, Creo, and a variety of other 3D CAD programs (Onshape preferred).
• Clarkson University graduate (B.S. Mechanical Engineering, 2009)
• Reside in NY State.
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• Proficiency with Onshape, SolidWorks, Creo, and a variety of other 3D CAD programs (Onshape preferred).
• Clarkson University graduate (B.S. Mechanical Engineering, 2009)
• Reside in NY State.
Experience
-
Sr. Mechanical Design Engineer
Plug Power · Full-time
Oct 2011 –
Mar 2025
13 yrs 5 mos
Latham, NY, United States
• Designed hydrogen fuel cell systems for forklift power plants, including complex manifold assemblies with multiple fluid paths, valves, sensors, and sealed connections.
• Integrated electrical components like busbars, cables, and insulators into system designs.
• Specialized in O-ring and gasket seals, standardized fittings, and diverse mechanical parts (milled, turned, sheet metal, injection-molded, and large steel castings). -
Sr. Mechanical Engineer
Eppendorf · Full-time
Dec 2012 –
Sep 2017
4 yrs 9 mos
Enfield, CT, United States
• Engineered laboratory shakers for microorganism culturing, focusing on materials selection, surface finishes, and GD&T.
• Partnered with purchasing and vendors to optimize designs for manufacturability, support prototyping, and develop assembly procedures.
• Resolved production unit issues through customer site visits.
• Key projects: Adjustable counterweight mechanism, LED array for photosynthetic growth, and V-belt drive with tensioning system. -
Mechanical Design Engineer
Pall Corporation · Full-time
Aug 2011 –
Sep 2012
1 yrs 1 mos
Cortland, NY, United States
• Created manufacturing equipment for filter processing, managing concept-to-fabrication phases, vendor collaboration, and 3D CAD modeling.
• Mastered pneumatic systems, bolted joints, pipe fittings, and welded connections.
• Key projects: Chemical vapor deposition machine for filter media, recirculating tubular conveyor for catalyst extraction, and leak testing fixture for gas filters. -
Mechanical Engineer
General Dynamics Electric Boat · Full-time
Jun 2009 –
Jul 2011
2 yrs 1 mos
Groton, CT, United States
• Supported USS Missouri submarine overhaul, performing electrical safety reviews, electronics testing, and coordination with tradesmen.
• Troubleshot pumps and compressors for Virginia- and Columbia-class submarines, leading component development and vendor collaboration.
• Conducted static loading and shock analysis for aircraft carrier propulsion structures using proprietary FEA software.
Education
- Clarkson University B.S., Mechanical Engineering 2005 – 2009
Other experience
- Mechanical Design Skilled in optimizing parts for cost-effective quoting and large-scale production across multiple manufacturing processes including machining, sheet metal fabrication, injection molding, thermoforming, pressure forming, casting, weldments, and 3D printing.
- Software Expert in SolidWorks, Onshape, PTC Creo, PTC Windchill, and MS Office Suite. Familiar with Autodesk Inventor, CATIA, Solid Edge, and AutoCAD.
Licenses & Certifications
- Secret Security Clearance (Inactive) Department of Defense Jun 2009 – Jul 2011
- E.I.T. Certification NY State Jun 2009 – Present
Stats
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Joined: March 24, 2025
Last seen: February 28, 2026
Area of Expertise
Machine Design
Gadgets Design
Mechanical Drafting
Concept Design
Mechanical Engineering
Patent Drawings
3D Design Services
2D to 3D Conversion Services
FEA Finite Element Analysis
3D Solid Modeling
Design Engineering Services
Prototype Design Engineering
Machine Drawing Services
Paper to CAD Conversion
Mechanical CAD Design
3D Product Demo
3D Product Modeling
2D to 3D Modeling
Mechanical Drawing Services
Electronic Enclosures Design
Languages
English Native or bilingual proficiency
Location
Poughkeepsie, NY, United States