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Mechanical Commissioning Engineer

Faith Technologies · Madison, WI · Full time

Posted Oct 2, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about a time you found a real issue during commissioning. How did you document it and get it fixed?

What they are checking: Whether they write clear issue logs and follow through until the deficiency is actually closed.

You'll work under a senior commissioning engineer or field manager. How do you decide when to make a call yourself and when to check with them?

What they are checking: Whether they know the limits of their authority and escalate the right things without being helpless.

What would you do

The contractor says a system is ready for functional testing, but you show up and half the checklist isn't done. What do you do?

What they are checking: Whether they can hold the line on readiness while keeping a good working relationship with the trades.

How do you explain a failed test to an owner's rep who isn't technical?

What they are checking: Whether they can communicate risk and next steps clearly to owners without jargon or blame.

About the work

Walk me through how you'd build a commissioning plan for a new mechanical system, from owner requirements to final sign-off.

What they are checking: Whether they understand commissioning as a sequenced process tied to the owner's functional requirements, not just final testing.

What's the difference between pre-functional checklists and functional performance tests, and why do you need both?

What they are checking: Whether they know the core commissioning steps that catch install issues before testing how the system performs.

How do you read a one-line diagram or a control schematic to plan what you'll test on site?

What they are checking: Whether they can turn drawings into test steps, which the posting says is a must for this role.

You're testing an air handler and it won't hold its supply air setpoint. How would you work through it?

What they are checking: Whether they troubleshoot in a logical order across sensors, controls and mechanical parts instead of guessing.

How do you plan the sequence and schedule of commissioning activities so you're not waiting on other trades?

What they are checking: Whether they can coordinate around construction progress, since the role builds schedules and resourcing plans.

What safety practices do you follow when testing energized mechanical and electrical equipment on a jobsite?

What they are checking: Whether they treat lockout/tagout and live testing hazards seriously, which matters on any active site.

How comfortable are you with Microsoft Office tools for building test scripts, trackers and reports? Give an example.

What they are checking: Whether they can produce organized commissioning documents, since the paperwork is a big part of the deliverable.

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The full job description

As published by Faith Technologies.

You’ve discovered something special. A company that cares. Cares about leading the way in construction, engineering, manufacturing and renewable energy. Cares about redefining how energy is designed, applied and consumed. Cares about thoughtfully growing to meet market demands. And ─ as “one of the Healthiest 100 Workplaces in America” ─ is focused on the mind/body/soul of team members through our Culture of Care . The Mechanical Commissioning Engineer is responsible for the successful development, implementation, and coordination of project commissioning plans and documents, as well as conducting on-site/jobsite coordination and execution of commissioning activities. This work is completed under the general oversight of an upper-level Commissioning Engineer or Commissioning Field Manager. The Mechanical Commissioning Engineer is responsible for supporting the creation of complete project commissioning plans, resourcing plans, and execution of commissioning activities based on a clear understanding of the owner, facility and equipment functional requirements. Plans include sequenced activities, schedules, and documents, as well as conducting on-site/jobsite execution and auditing of jobsite commissioning activities. The ideal candidate must be proficient in the use of a PC and Microsoft Office Suite, the ability to understand one-lines, schematics & drawings is necessary, knowledge of Mechanical terminology and components is necessary. MINIMUM REQUIREMENTS Education: Bachelor of Science in Mechanical Engineering or equivalent experience Experience: 3 to 8 years of related experience or 5 to 12 years of mechanical commissioning experience Travel: up to 50% Work Schedule: This position works between the hours of 7 am and 5 pm, Monday through Friday. KEY RESPONSIBILITIES • Works with Preconstruction Managers and Project Managers at the beginning of projects to define commissioning requirements and establish plans to complete commissioning documentation and other deliverables. • Assists with creating LOTO plans and start-up scripts. • With direction from upper-level Commissioning Engineer, completes detailed procedures and checklists to document the equipment performs to the specifications and the equipment is integrated into a functioning system. • Assists Commissioning Site Lead with establishing structure, training, and implementing LOTO and start-up scripts. • Conducts field surveys. • Collects and enters data to ensure that equipment conforms to operational standards and requirements. • Provides support material or reports to Project Managers and commissioning team as required. • Provides reports that documents the equipment functions per the project specifications and requirements. • Provides support for field commissioning activities through research and addressing needs during the commissioning process. • Provides guidance to office and field teams to ensure start-up activities comply with specifications, codes, and customer requirements. • Works with equipment providers to troubleshoot installed equipment during start-up, testing, and commissioning. • Performs other related duties as required and assigned. The job description and responsibilities described are intended to provide guidelines for job expectations and the employees’ ability to perform the position described. It is not intended to be construed as an exhaustive list of all functions, responsibilities, skills and abilities. Additional functions and requirements may be assigned by supervisors as deemed appropriate. How Does FTI Give YOU the Chance to Thrive? If you’re energized by new challenges, FTI provides you with many opportunities. Joining FTI opens doors to redefine what’s possible for your future. Once you’re a team member, you’re supported and provided with the knowledge and resources to achieve your career goals with FTI. You’re officially in the driver’s seat of your career, and FTI’s career development and continued education programs give you opportunities to position yourself for success. FTI is a “merit to the core” organization. We recognize and reward top performers, offering competitive, merit-based compensation, career path development and a flexible and robust benefits package. Benefits are the Game-Changer We provide industry-leading benefits as an investment in the lives of team members and their families. You’re invited to review the full list of FTI benefits available to regular/full-time team members. Start here. Grow here. Succeed here. If you’re ready to learn more about your career with FTI, apply today! Faith Technologies, Inc. is an Equal Opportunity Employer – veterans/disabled. Employment is contingent upon successfully passing a background and drug test

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