WE ARE OnQCx and we hire GREAT PEOPLE who do GREAT WORK for GREAT CLIENTS!

Our team members are consummate professionals who are well respected by our Fortune 100 clients in the semiconductor/cleanroom, manufacturing, and mission-critical data center industries. Our mission is to do the very best for our clients and customers with integrity, professionalism, and altruism allowing them to be the very best in their business globally.

Are you ready to be a part of a dynamic team that values excellence, integrity, and collaboration? Our dedicated team believes in honesty, integrity, performance, partnership, and trust, ensuring long-lasting customer and employee relationships built on solid principles. By upholding the highest standards of quality and performance, we aim to achieve total customer satisfaction in the various markets we serve.

Lead Commissioning Engineer – Data Center

Mechanical, Electrical & Instrumentation and Controls (I&C)

Company: OnQCx
Location: Remote with Occasional Project Travel
Industry: Hyperscale Data Centers / Mission Critical Facilities
Primary Focus: Level 4 Functional Performance Testing (FPT) and Level 5 Integrated Systems Testing (IST)

Position Summary

OnQCx is seeking an experienced Lead Commissioning Engineer to develop Level 4 Functional Performance Test (FPT) procedures and Level 5 Integrated Systems Test (IST) scripts for large-scale data center projects.

This position requires strong multidisciplinary expertise in mechanical, electrical, and instrumentation and controls (I&C) systems, with an emphasis on understanding system interactions, operating sequences, redundancy, and failure modes.

The successful candidate will independently review engineering drawings, P&IDs, electrical single-line diagrams, Sequences of Operation (SOOs), equipment submittals, installation procedures, and O&M manuals to develop comprehensive, technically accurate, and executable commissioning test scripts.

This is primarily a technical engineering and test development role, not a field commissioning management position.

Key Responsibilities

Engineering Review & Analysis

• Review mechanical, electrical, and I&C drawings, P&IDs, single-line diagrams, SOOs, equipment submittals, installation procedures, and O&M manuals.
• Analyze system operating sequences, control logic, interlocks, alarms, redundancy configurations, and equipment failure responses.
• Identify design discrepancies, missing information, and technical conflicts requiring engineering clarification.
• Establish test requirements and acceptance criteria based on design intent, specifications, and manufacturer documentation.

Level 4 – Functional Performance Test Development

• Develop detailed, executable L4 FPT scripts for mechanical, electrical, and controls systems.
• Define test prerequisites, procedures, expected results, measurable acceptance criteria, and documentation requirements.
• Develop test scenarios for normal operation, startup/shutdown, equipment staging, failure conditions, and automatic recovery.
• Verify control sequences, interlocks, alarms, protective functions, and equipment redundancy.

Level 5 – Integrated Systems Test Development

• Develop L5 IST scripts validating interactions between electrical distribution, standby power, mechanical cooling, and controls systems.
• Create failure-mode scenarios involving utility outages, generator and UPS failures, cooling interruptions, and controls failures.
• Validate redundancy, failover, transfer sequences, system recovery, and integrated performance under abnormal operating conditions.
• Define expected system responses, timing requirements, monitoring points, and acceptance criteria.

Technical Coordination & Quality

• Coordinate with design engineers, contractors, OEMs, controls integrators, and commissioning teams.
• Lead technical reviews of test scripts and resolve engineering questions.
• Maintain test documentation, revision control, and traceability to approved design requirements.
• Provide technical support during commissioning execution, troubleshooting, and deficiency resolution.
• Ensure scripts are complete, accurate, and ready for field execution.

Required Qualifications

Experience & Education

• Bachelor's degree in Mechanical, Electrical, Controls Engineering, or related discipline; equivalent relevant experience considered.
• Minimum 8 years of engineering or commissioning experience, including 5 years in data center or mission-critical facilities.
• Demonstrated experience personally developing L4 FPT and L5 IST scripts.
• Strong multidisciplinary understanding of mechanical, electrical, and I&C systems.
• Ability to independently interpret complex engineering documents and translate requirements into executable test procedures.
• Experience evaluating system dependencies, failure modes, redundancy, and integrated operating sequences.
• Strong technical writing, analytical, and problem-solving skills.

Technical Knowledge

Mechanical

• Chilled water and condenser water systems, chillers, cooling towers, pumps, CRAH/CRAC units, and heat exchangers.
• Mechanical redundancy, equipment staging, control sequences, and cooling system failover.
• Familiarity with liquid cooling and Coolant Distribution Units (CDUs).

Electrical

• Medium- and low-voltage distribution, switchgear, transformers, generators, UPS, ATS/STS, and power distribution equipment.
• Electrical redundancy, protective functions, power transfer sequences, and failure recovery.
• Load bank testing and integrated electrical system operation.

Instrumentation & Controls (I&C)

• BMS, EPMS, PLCs, sensors, instrumentation, and control systems.
• Control logic, interlocks, alarms, communication interfaces, and system integration.
• Control system redundancy, failure response, and trend analysis.

• High school diploma or equivalent.
• Experience in project administration, document control, quality support, commissioning support, or a related role.
• Proficiency in Microsoft Excel, Word, Outlook, and shared document platforms. CxAlloy Commissioning Database
• Strong organizational skills and attention to accuracy, version control, and deadlines.
• Clear written and verbal communication skills.
• Ability to manage multiple priorities and follow up consistently with multiple stakeholders.
• Ability to work independently while supporting a multidisciplinary project team.
• Associate degree, technical training, or equivalent relevant experience.
• Experience supporting construction, data center, industrial, mission-critical, or building systems projects.
• Familiarity with QA/QC processes, commissioning workflows, inspections, deficiency tracking, and turnover documentation.
• Experience with commissioning databases, construction management software, or electronic document management systems.
• Ability to interpret equipment identifiers, system references, and basic construction documentation.

Benefits

• Health Insurance
• Dental Insurance
• Vision Insurance
• 401(k)
• Holiday Pay
• Paid Time Off 

EEO Statement: OnQCx is an equal opportunity employer and prohibits discrimination and harassment of any kind. We are dedicated to creating a work environment that is inclusive and welcoming to all employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. 

Notice to all Employment, Staffing & Recruiting Agencies and Recruiters: We please ask that you do not directly email, call or visit our hiring managers. OnQ does not accept unsolicited resumes and should any be received from a third party they will not be considered, unless a signed agreement is in place. If you would like to discuss becoming a preferred staffing vendor to OnQ please contact our talent acquisition team who will advise you on the process.