Senior Process Engineer

Ohr; Colorado; On-site; USD 140,000 - 180,000; Full time

Benefits offered by this job

Relocation assistance

Job summary

Ohr, based in the Denver-Boulder Metro Area, seeks a Senior Process Engineer to scale up technology into deliverable engineering packages. You will serve as Responsible Engineer on multiple projects and partner early with R&D to mitigate scale-up risks, ensuring timely, technically solid designs.

You will lead interactions with vendors and EPCs, validate calculations, and drive FEED through commissioning, with a focus on safety and reliability.

Qualifications

• Bachelor-level or higher degree in a chemical/mechanical/bioprocess engineering field.

Responsibilities

• Develop heat and material balances, size and specify equipment, and produce PFDs and P&IDs for new and modified processes.
• Own delivery of engineering packages on schedule and within budget, with technical defensibility.
• Serve as Responsible Engineer on multiple concurrent projects.
• Partner with R&D early to retire scale-up risk before it reaches a drawing.
• Lead technical interactions with equipment vendors, EPC contractors, and consultants with sound technical positions.
• Contribute to HAZOPs, risk identification, and validate calculations, balances, equipment sizing, and specifications.
• Support pilot and commercial sites through feasibility, permitting, FEED, EPC scope, commissioning, and operations.
• Improve team infrastructure: design memos, sizing tools, work instructions, and quality checklists.
• Apply process simulation and AI-assisted modeling and digital twin work.

Skills

Data gathering

Prioritization

Deadline adherence

Excellent communication

Team collaboration

Education

Four-year engineering degree in chemical, mechanical, bioprocess, or related field

10+ years of technical experience in process engineering

Tools

Aspen Plus

Aspen HYSYS

ChemCAD

PRO II

UniSim

ProMax

HTRI

Job description

The future must be created.

01 THE ROLE

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 extractants and the ignition chemicals already in production today.

As a Senior Process Engineer at Ohr you take our technology from scale‑up through delivered engineering packages - balances, equipment, drawings, and the project plans that put them on the ground. You'll be Responsible Engineer on several projects at once, and the person R&D comes to when a scale‑up question needs an engineering answer rather than an opinion.

THE KIND OF PEOPLE THIS WORK DEMANDS

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.

02 WHAT YOU'LL DESIGN AND BUILD

• Develop heat and material balances, size and specify equipment, and produce PFDs and P&IDs for new and modified processes

• Own delivery of engineering packages - on schedule, inside budget, and technically defensible

• Serve as Responsible Engineer on multiple concurrent projects

• Partner with R&D early to find and retire scale‑up risk before it reaches a drawing

• Lead technical interactions with equipment vendors, EPC contractors, and consultants, responding to EPC needs promptly and with sound technical positions

• Contribute to HAZOPs and risk identification, and validate calculations, balances, equipment sizing, and specifications prepared by other engineers

• Support pilot and commercial sites through feasibility, permitting, FEED, EPC scope, commissioning, and operations

• Improve the infrastructure the team runs on - design memos, sizing tools, work instructions, and quality checklists

• Apply process simulation and, where it earns its place, AI‑assisted modeling and digital twin work

03 WHAT YOU BRING WITH YOU

You're the engineer who reads someone else's heat balance and finds the assumption nobody wrote down. You want your name on packages that get built, and you'd rather work somewhere your judgment is the deciding input than somewhere it's one of nine reviews. You likely have:

• A four-year engineering degree in chemical, mechanical, bioprocess, or a related discipline

• 10+ years of technical experience in process engineering

• Broad engineering and operations knowledge across both internal projects and external partner work

• Experience specifying equipment such as reactors, tanks, heat exchangers, pumps, and vessels

• Strong experience with process simulation software (Aspen Plus, Aspen HYSYS, ChemCAD, PRO II, UniSim, ProMax, HTRI)

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

• The ability to gather data, set priorities, and hit deadlines without being managed to them

• Excellent written and verbal communication, including with non-technical third parties

Strong plus

• Pilot plant design, commissioning, or startup experience

• Experience in bioprocess, fermentation, and separation equipment design and operation

• Process Safety Management experience in a regulated process industry

• Experience mentoring junior process engineers

WHAT SUCCESS LOOKS LIKE

AFTER 3 MONTHS

• You're Responsible Engineer on live projects and your packages are going out without rework

AFTER 6-12 MONTHS

• Engineering packages delivered on schedule across multiple concurrent projects

• Scale‑up risks are being caught in design review rather than in the field

• The team's design tooling and standards are measurably better than you found them

04 COMPENSATION

This is an onsite role based in the Denver-Boulder Metro Area (Lafayette, CO), with travel up to 15% to pilot sites, laboratories, and vendor facilities. Relocation Assistance provided. The annual base salary range for this position is $140,000 - $180,000, commensurate with experience, plus equity. Final compensation will be determined based on skills, experience, and qualifications.

Be a creationary.