Senior Process Engineer — Rotary Kilns Temperature Reactors

Process Engineering
· Idaho Falls,  
· Full-time

Raven-Flint Nuclear Corporation is building the first uranium conversion plant designed from the ground up to operate without elemental fluorine (F2). Conversion is the critical, under-supplied step that turns uranium oxide into the uranium hexafluoride (UF6) feedstock the enrichment industry depends on — and we intend to rebuild that capability on U.S. soil with a process that is fundamentally safer and simpler.

We are headquartered in Idaho Falls, Idaho, and we scale in three deliberate stages. Match, our bench-scale proof of the process chemistry, is due in 2026. Torch, our pilot plant, comes online in Idaho in mid-2028 and will convert 500 metric tons of uranium per year into UF6. Forge, our full commercial plant, follows by 2030.We are well funded, the roadmap is clear, and our only real constraint is time.

We believe hardware testing — not paperwork — is the truest measure of progress, and we are moving fast to take our chemistry out of the lab and into a running plant. This is a once-in-a-generation chance to rebuild a critical piece of the nuclear fuel cycle on American soil — and if you want to see your designs cut metal, get built, and run, there is no better place to be.

You will own a high-temperature rotary reaction system outright: the design basis, the thermal profile and residence-time distribution, the heat and material balances, the PFDs and P&IDs, and the safety case. Heat transfer, solids conveying and hold-up, agglomeration and ring formation, refractory and alloy selection, end-seal integrity in a controlled atmosphere, and off-gas handling are yours to get right — and most of them are decided once, at the vendor's shop, and lived with for the life of the plant.

This is a scarce specialty and we are treating it as one. You will work directly with our chemistry team to carry laboratory data into a defensible reactor design, and you keep the system after FEED — as its named owner overseeing our EPC's detailed design, sitting in the HAZOPs, and approving what gets built.

We run a fast-paced front end with a small senior team, backed by an AI documentation pipeline that absorbs the volume work so your hours go to engineering judgment instead of formatting.

• - Own the reactor design basis, thermal and residence-time models, and heat and material balances
• - Set the temperature profile, fill fraction, slope, and speed basis, and defend the scale-up argument
• - Specify heating method, refractory and alloy selection, and end-seal arrangement for controlled-atmosphere service
• - Define solids feed, discharge, and off-gas handling scope with mechanical and vendors
• - Develop and defend the system's PFDs and P&IDs through concept select, FEED, and HAZOP
• - Set materials, corrosion, and containment requirements with the materials and mechanical engineers
• - Produce process datasheets and support long-lead equipment requisitions
• - Lead HAZID/HAZOP participation and close-out for your system
• - Carry the system into EPC oversight as its named technical owner — design reviews, technical bid evaluations, MOC authority

• - B.S. in Chemical, Mechanical, or Materials Engineering or equivalent; advanced degree welcome
• - 8+ years process engineering, or 6+ with a graduate degree in a related field, including direct rotary kiln, calciner, or high-temperature furnace design work
• - Demonstrated rotary-reactor engineering: thermal profile and heat-transfer modeling, residence-time and fill-fraction basis, scale-up from bench or pilot data
• - Working knowledge of refractory, alloy, and seal selection for high-temperature service
• - Solids handling…