Open to opportunities

Jeff User

@jroy

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Senior mechanical engineer specializing in medical devices, industrial automation, and visualization workflows.

United States

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What I'm looking for

I seek hands-on engineering roles where I can drive concept-to-production design, perform testing/analysis, improve manufacturability, and collaborate with cross-functional teams.

I am a senior mechanical engineer with broad experience taking products from concept through production and field support, focusing on medical devices and industrial automation. I combine hands-on prototyping with rigorous analysis—tolerance stack-ups, FEA, thermal, and reliability testing—to ensure robust, manufacturable designs.

I have led design efforts across disposable components, assemblies, and system-level layouts while interfacing with vendors and clients to transition designs to OEM production and improve manufacturability and cost. I also developed visualization workflows, converting CAD and NURBS assets into UE5-ready meshes and creating animations that highlight human factors and ergonomics.

I thrive on iterative development: building test fixtures, executing DOE and benchmark tests, and collaborating with manufacturing, service, and quality teams to resolve field issues and optimize production. My work balances practical prototyping skills with formal engineering analysis to drive reliable, manufacturable products to market.

Experience

Work history, roles, and key accomplishments

Senior Visualization Engineer

Product Insight

Jan 2024 - Oct 2025 (1 year 9 months)

Developed concept CAD and UE5 blueprints to render and animate engineered assets and metahumans for human-factors-focused visualizations, creating contextual scenes and workflows to communicate design ergonomics.

Unreal Engine 5 CAD NURBS To Mesh Conversion 3D Modeling Render Animation Human Factors

Senior Mechanical Engineer

Product Insight

Apr 2022 - Jan 2024 (1 year 9 months)

Designed and documented medical device and industrial automation components, prototyped and tested iterations, and performed tolerance, DFM, FEA, and thermal analyses to ensure manufacturability and reliability.

Mechanical Design Prototyping DFM Vendor Management GD&T 3D Printing

Senior Mechanical Engineer

Transmedics

Oct 2019 - Apr 2022 (2 years 6 months)

Engineered disposable component installation and upgraded gas delivery/manifold systems for Class III medical devices; developed reliability test plans and fixtures and reduced installation misalignment to under 1°.

Reliability DFM Mechanical Design Vendor Transitions

Mechanical Engineer

Cytonome

Apr 2017 - Jul 2019 (2 years 3 months)

Designed system layouts for electronics, fluidics, disposables, and optics with focus on manufacturability and field serviceability; implemented thermal management and improved RIM/injection molded part quality and inspection processes.

System Design RIMS Injection Molding Manufacturability GD&T

Mechanical Engineer

PowerCon

Jun 2016 - Mar 2017 (9 months)

Designed reactor housings and supported project documentation and third-party inspections for electrical grid switchgear, researching arc-resistant methods and assisting R&D for new ground and test devices.

Mechanical Design Documentation Compliance

Mechanical Engineer Contractor

PowerCon

Jul 2015 - Jun 2016 (11 months)

Provided contract mechanical engineering support for switchgear projects, documentation, and inspections to enable production and compliance prior to full-time engagement.

Documentation Inspection Coordination Mechanical Design Switchgear Project Support

Product Design Engineer

Haydon Kerk Motion Solutions

Jun 2012 - Jul 2015 (3 years 1 month)

Supported linear motion product lines by approving documentation and releases, producing GD&T drawings for customized components, and providing feasibility analysis and prototype assembly support for custom motor products.

GD&T Documentation Quality Control