Principal Process Engineer

The future must be created.

Chemistry is the invisible layer under every critical system, and the supply chain behind it has become a weapon. Ohr makes the molecules that matter most, from the atom up: energetics, propellants, rare‑earth extract ants and the ignition chemicals already in production today.

Ohr is building the pilot facilities that turn our chemistry into production, and this role owns the process engineering that gets them built. As Principal Process Engineer you are accountable for the balances, the equipment, the drawings, and the engineering packages that EPC contractors build from — the technical authority that vendors and contractors answer to, and still the person running the calculation yourself.

Our mission demands more than great science. It requires a particular kind of team — visionary builders, hustlers, scientists, operators. Together, we carry both the technical depth to make the chemistry work and the commercial instinct to make the business thrive. People are our engine. Collaboration is our multiplier.

• Own process engineering for Ohr's pilot facilities end to end — heat and material balances, equipment sizing and specification, PFDs, P&IDs, and the engineering packages that get built

• Serve as Responsible Engineer across concurrent pilot projects: set the technical position, hold the schedule, own the budget

• Lead technical interactions with EPC contractors, equipment vendors, and outside consultants, responding to their needs quickly and clearly

• Translate R&D chemistry and biocatalysis into scalable unit operations, surfacing scale‑up risk during early engineering

• Lead HAZOP, PHA, and risk mitigation for facility design and operations

• Establish the design standards, calculation methods, design memos, and review gates that a growing engineering team will inherit

• Hire and mentor a small process engineering team while staying hands‑on yourself

• Support projects through feasibility, permitting, FEED, procurement, construction, commissioning, and startup

You're the engineer who has watched enough designs get built to know which assumptions break in the field. You'd rather be the one who owns the material balance than the one who reviews it, and you're at the point in your career where you want a facility with your judgment in it rather than a larger org chart. You likely have:

• A four‑year degree in chemical engineering

• 15+ years of process engineering experience (or 10–12 years with a Ph.D. or Masters, respectively), with a track record of designs that have been built and operated

• Breadth across process design and operations, with real depth in at least one of: bioprocess and fermentation scale‑up, chemical synthesis scale up, or chemical catalysis

• Experience specifying reactors, vessels, tanks, heat exchangers, pumps, filtration, and separations

• Strong command of process simulation — Aspen Plus, Aspen HYSYS, ChemCAD, Uni Sim, Pro Max, HTRI, or equivalent

• Working knowledge of process instrumentation, control valves, and control loops

• Process Safety Management and hazardous materials handling experience

• The judgment and presence to be the domain expert in a room of vendors, contractors, and regulators

• Pilot plant commissioning and startup experience

• Experience in ATF-, DoD-, or DDESB-regulated manufacturing environments

• Professional Engineer (PE) license

• Experience with AI‑enabled engineering tools, process modeling, and digital twins

• You've connected with and are closely engaged with our research and development team, proactively translating data collected in the lab into pilot facility design

• You're leading the basic engineering…