Sr. Commissioning Field Service Engineer (UPS)
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Job Summary
High-Level Data Center Commissioning position
A top-tier leader in critical power solutions is actively seeking a Senior Commissioning Field Service Engineer (UPS) to join their team in Marietta GA. This is an exciting opportunity to work on cutting-edge power systems and make a real impact in the field.
Position Summary
We are seeking a senior-level Data Center Commissioning Technician with deep expertise in UPS systems critical power infrastructure and large-scale load testing. This is not a preventative maintenance or parts replacement role. This position requires a commissioning professional who can lead testing events interface confidently with general contractors and clients and execute high-risk power transitions in live environments.
The ideal candidate has completed multiple full data center commissioning projects understands commissioning levels (L2L5) and has hands-on experience executing MW-scale load bank testing and generator-to-UPS transfers under load.
Key Responsibilities
- Lead and execute data center commissioning activities (Levels L2L5)
- Perform and oversee large-scale load bank testing (500kW to 1MW)
- Execute generator-to-UPS transfer testing under live load
- Commission and validate parallel redundant UPS systems (N1 2N)
- Perform static and maintenance bypass transitions without load disruption
- Conduct closed-transition generator testing
- Validate synchronization (voltage frequency phase alignment)
- Commission lithium-ion and VRLA battery systems
- Perform battery discharge testing and string balancing verification
- Identify and troubleshoot DC ground faults and bypass events under load
- Integrate UPS systems with BMS / EPMS platforms
- Execute commissioning from approved MOPs; redline and update documentation
- Ensure compliance with ISO NFPA and NEC standards
- Enforce safety standards and stop work when unsafe conditions arise
- Lead multi-stakeholder commissioning events (GC EC CxA client)
Required Experience
- 5 years of UPS field service experience
- 3 years specifically in commissioning
- Completion of at least 3 full data center commissioning projects
- Experience executing load bank tests above 500kW (1MW preferred)
- Experience with generator-to-UPS transfers under load
- Experience working in live data center environments
- Demonstrated ability to lead commissioning events
Required Technical Expertise
UPS Platforms (Must Have Experience with Multiple)
- Eaton
- Delta
- Schneider Galaxy
- Vertiv Liebert
- Toshiba
- Mitsubishi
- Riello / Legrand Trimod
Power Systems Knowledge
- Static bypass vs. maintenance bypass operation
- Synchronization requirements (voltage phase frequency)
- Break-before-make vs. make-before-break transitions
- Wrap-around bypass systems
- kVA to kW calculations (including 0.9 PF systems)
Load Banking & Testing
- Cable sizing and Cam-Lok verification
- Arc flash boundary understanding
- Heat exhaust planning
- Power Quality Analyzer (PQA) placement
- Cooling capacity verification
- Generator capacity validation
Battery Systems
- Commissioning lithium-ion systems (Samsung SDI Saft Narada etc.)
- VRLA battery systems
- Float voltage tolerances on 480V DC strings
- String balancing verification
- Discharge testing procedures
Leadership & Professional Competencies
- Ability to lead under pressure in high-visibility environments
- Confident communicator with contractors and clients
- Strong decision-making during live power events
- Willingness to stop testing if safety risks are identified
- Highly detail-oriented with documentation and QA/QC
Documentation & Process Experience
- Experience executing and redlining MOPs (Method of Procedure)
- Familiarity with QA/QC documentation and test scripts
- Experience preparing commissioning sign off packages
- Knowledge of ISO / NFPA / NEC compliant environments
Preferred / Elite Experience (Highly Desired)
- Commissioned parallel redundant UPS systems (N1 2N)
- Closed-transition generator testing
- Integration of BMS / EPMS during commissioning
- Experience in Tier III or Tier IV data centers
- Experience on multi-megawatt (MW) facilities
Travel
- Travel required as needed for commissioning projects
- Must be comfortable with regional or national travel
Compensation
Compensation will be commensurate with experience and commissioning leadership capability. This is a senior-level position and will be structured competitively based on technical depth and project leadership experience.
Requirements
Ideal Candidate Profile
- 510 years UPS field service background
- 3 years dedicated commissioning experience
- Has led or executed 1MW load testing
- Comfortable leading MOP execution
- Has experienced real-world generator transfer challenges
- Strong knowledge of both Lithium-ion and VRLA battery systems
- Confident presence in front of GCs and clients
Benefits
Competitive Pay
Three medical plan options with employer premium contributions that start on day one
HSA
401K plan with 100 % match on the first 4% of employee contribution
Required Skills:
What You Bring Bachelors degree or equivalent experience Strong communication skills and a natural ability to build relationships Highly organized with a proactive problem-solving mindset Solid working knowledge of Microsoft Word Excel and Outlook Experience with CRM systems and enthusiasm for learning new tools Exposure to electrical or mechanical systems is a plusbut not required
Required Education:
BS or equivalent
