Hydrogen System Design Engineer Winchester, Virginia

About Our Company

At Heven Aero Tech (Heven), we don’t just believe in the power of people—we build our success on it. As a recognized leader in hydrogen-powered drones, we’ve earned recognition for creating a workplace where innovation thrives, collaboration is second nature, and every employee feels valued. Our culture is anchored in trust and a shared commitment to excellence.

We believe great teams are built on individuals who are humble, hungry, and smart - those who put team success first, take initiative to continuously improve, and demonstrate strong interpersonal awareness. At Heven, your voice matters, your ideas are heard, and your contributions make a tangible impact as you grow through hands‑on experience and collaboration across the team.

As the Hydrogen System Design Engineer, you will own design updates to our field‑ed hydrogen generation, storage, and fueling systems, and lead mechanical and process design for future concepts in hydrogen storage, compression, and dispensing. You will work day‑to‑day alongside engineers who assemble and build each unit and test it and the electronics engineers for controls and instrumentation. Together the team will incorporate lessons from bench and in the field into designs that are safer, more reliable, and ready to scale into production.

• Lead design updates to existing hydrogen generation, storage, and fueling systems, resolving issues found in the field or in testing and improving reliability and manufacturability.
• Design future concepts in hydrogen storage, compression, and dispensing, from initial concept and P&IDs through detailed design, tolerancing, and release.
• Select and size pressure-boundary components - valves, regulators, relief devices, vessels, hoses/fittings, and compressors - appropriate for hydrogen service across the relevant pressure ranges.
• Develop and maintain P&IDs, 3D CAD models, and GD&T drawings; working with personnel to manage engineering change control as designs evolve.
• Work directly with assembly and production engineers to ensure designs are buildable, resolve fit-up and build issues, and incorporate assembly feedback into revisions.
• Work directly with test engineers to define test and acceptance criteria, support troubleshooting, and close the loop between test data and design changes.
• Coordinate with electronics engineers on sensor placement, instrumentation, interlocks, and control logic that depends on the mechanical design, including safety shutdowns and fill sequencing.
• Apply relevant codes and standards (such as ASME B31.3, NFPA 2, CGA guidelines, and OSHA ) and support Process Hazard Analyses / HAZOPs for new and revised designs.
• Produce and maintain engineering documentation - drawing packages, BOMs, assembly and test procedures, and design basis records - sufficient to support manufacturing scale-up.
• Evaluate design alternatives with clear cost and manufacturability trade-offs, while treating safety margin and code compliance as non-negotiable design constraints.
• Support proposals and technical content for government agency programs (e.g., SBIR/STTR, DoD, DOE), including drawings, performance data, and design descriptions.

• Bachelor's degree in preferred Mechanical Engineering or a related technical discipline, and equivalent hands‑on engineering experience.
• 10+ years of direct experience in design and/or process engineering.
• Design experience with pressurized gas or fluid systems (hydrogen, industrial gas, cryogenic, or similar high-consequence service strongly preferred).
• Experience selecting and specifying high-pressure components such as valves, regulators, relief devices, vessels, and fittings.
• Experience reading and working from engineering drawings, P&IDs, and technical specifications.
• Working knowledge of relevant engineering and design codes and standards (ASME B31.2/B31.3, CGA guidelines, or similar).
• Strong troubleshooting skills and comfort working hands‑on with hardware in a lab or production environment.
• Clear, disciplined documentation habits, with the ability to produce technical reports and data packages that others can rely on.
• Safety‑first mindset,…