Commissioning Engineer

Dual Fuel - Commissioning Engineer
Dual Fuel Company LLC is hiring a Commissioning Engineer to plan, execute, and own the startup and commissioning of our new mechanical installations. Working alongside our project management and field crews, you take each installed mechanical plant (heating, cooling, etc.) from pre-startup readiness through first fire, functional testing, and verified operation — then document the finished system and hand a fully commissioned plant to the owner and our service team.

Because Dual Fuel self-performs the work, your engineering carries all the way through to a completed, tested, and documented retrofit. You are the person who confirms the system runs the way it was designed to run — and who signs the report that says so.

This is a hands-on role. You will be in the mechanical room operating equipment, taking readings, running combustion tests, and verifying control circuits — not directing the work from a desk.

What You'll Do

Commissioning Planning (Technical Review)

– Join the project team at technical review to build the commissioning plan for each installed system — the functional tests, KPIs, and data you will need to prove performance.

– Review finalized schematics and the written Sequence of Operations for HVAC systems, steam, hydronic, and domestic hot water systems. Raise design or constructability questions as RFIs before installation.

– Define startup sequencing, long-term data-logging needs, and any specialized test equipment ahead of the field date.

Pre-Startup Readiness & Walkthrough

– Walk the installation near the end of the plumbing scope to confirm hardware is installed per print and manufacturer I&O, sensors are correctly located, and all wiring is complete.

– Own the go/no-go call on startup readiness; log deficiencies to the project punch list with an owner and due date on each item, and hold the startup until the site and equipment are ready.

– Confirm OEM/vendor startup techs, shutdown windows (heat, DHW, gas, electric), Con Edison gas turn-on, and inspection coordination are locked before mobilizing by .

Startup Execution (Hands-On)

– Energize and start boilers, pumps, and controls; confirm each unit fires and runs, and that all inputs and outputs are reading correctly.

– Run combustion analysis on a calibrated analyzer; set and record O₂, CO, stack temperature, and combustion efficiency across the firing range.

– Verify safeties and interlocks — LWCO, high-limit, gas pressure switches, flame safeguard, and proof-of-closure — function as designed.

– Check and troubleshoot line- and low-voltage control circuits, and set up longer-term test instrumentation for the commissioning phase.

Commissioning & Functional Testing

– Prove system sequencing and equipment staging behave per the Sequence of Operations — lead/lag rotation, modulation, day/night setback, and summer/winter changeover.

– Confirm all subsystems meet requirements, including condensate, vacuum, and return pumps on steam plants.

– Validate that controls — including Dualfuel’s Axxon platform where included — are reading and commanding equipment correctly.

– Use temporary data logging to confirm performance over time (day vs. night, part-load modulation, multi-unit staging), and log every finding to the punch list in real time.

Reporting, Documentation & Closeout

– Produce the Commissioning Report documenting as-commissioned setpoints, test results, and verified operation — delivered shortly after the final commissioning visit and filed to the project record.

– Prepare the client-facing version of the report and the on-site Boiler Room Settings document that stays with the plant for the service team.

What You'll Bring

Required

– Bachelor's degree in Mechanical Engineering strongly preferred (or equivalent hands-on heating-systems experience).

– 4+ years of hands-on experience with commercial heating equipment — boilers, burners, pumps, and controls.

– Working knowledge of NYC steam and hydronic heating systems.

– Comfortable getting hands-on in an active mechanical room — operating boilers and pumps, taking meter and gauge readings, and safely checking and troubleshooting electrical control circuits.

– Ability to read mechanical schematics, wiring diagrams, and a written Sequence of Operations.

– Strong written communication — you will write the reports owners and our service team rely on.

– Valid driver's license; able to travel to job sites across NYC and Westchester.

– OSHA SST safety training certification.

Preferred

– 3+ years of startup and commissioning experience on boiler or heating-plant installations.

– Understanding of combustion analysis and optimization.

– Familiarity with building controls / BAS and remote-monitoring platforms.

– Understanding and familiarity with LL87 and LL97 retro commissioning and reporting.

Job Type: Full-time

Pay: $130,000.00 - $150,000.00 per year

Benefits:

• 401(k)
• 401(k) matching
• Dental insurance
• Employee assistance program
• Health insurance
• Life insurance
• Paid time off
• Retirement plan
• Vision insurance

Work Location: In person