Commissioning Engineer

Liberty Personnel Services, Inc.; Memphis (TN); On-site; USD 110,000 - 130,000; Full time

Benefits offered by this job

Bonus

Good benefits

Job summary

Liberty Personnel Services, Inc. is seeking a Field-Based Commissioning Engineer to support infrastructure projects in Memphis, Tennessee.

You will be embedded at active plant construction sites, leading pre-commissioning, commissioning, and startup of municipal and industrial treatment systems, owning system readiness and handover to operations. Candidates must have 3+ years in commissioning/startup in water/wastewater, US citizenship or permanent residency, experience with biological

Qualifications

• 3+ years of stable commissioning/startup experience in water or wastewater facilities.
• US citizenship or permanent residency (Green Card) required.
• Experience with biological treatment, membranes, filtration, disinfection, and sludge handling preferred.
• Familiarity with AWWA standards, WEF practices, and OSHA requirements for treatment plant construction/startup.
• Ability to execute field commissioning for process equipment, pumping systems, and plant controls (PLC/SCADA).
• Experience coordinating subcontractors, OEMs, and owner representatives during multi-phase startup.
• Strong ability to read P&IDs, process diagrams, and control narratives.

Responsibilities

• Serve as on-site liaison for owner/operators, EPC teams, subcontractors, and vendors during commissioning of water and wastewater systems.
• Coordinate pre-commissioning and commissioning activities across treatment processes from headworks to pumping systems.
• Lead system walkdowns, punch list development, and turnover package completion for process, mechanical, and electrical scopes.
• Execute commissioning plans for pumps, blowers, clarifiers, chemical feed, UV/chlorination, and SCADA integration.
• Perform functional testing, loop checks, and startup to validate performance against design and regulatory requirements.
• Track and close punch items to achieve milestones (mechanical completion, substantial completion, final acceptance).
• Coordinate readiness across civil, mechanical, electrical, and controls scopes in a multi-discipline site environment.
• Review P&IDs, process flow diagrams, control narratives, and specs for water/wastewater processes.
• Inspect field compliance with AWWA/WEF/OSHA standards and quality requirements.
• Interface with engineering, controls integrators, and operations to troubleshoot startup issues.
• Maintain detailed commissioning logs and turnover records for owner acceptance.

Skills

US Citizenship

3+ years commissioning

Water/wastewater treatment

P&IDs reading

Field communication

Safety & compliance

PLC/SCADA familiarity

Team coordination

Tools

PLC/SCADA

Job description

$110,000 to $130,000 + Bonus + Good Benefits

Field-BasedPosition

Site-based commissioning role focused on infrastructure projects, supporting field execution, system turnover, and client interface through pre-commissioning, commissioning, and startup of municipal and industrial treatment systems. Embedded at active plant construction and retrofit sites with ownership of process system readiness, performance validation, and handover to operations.

Required Experience:

• US Citizenship or Permanent US Residency (Green Card)
• Minimum 3+ years of stable commissioning, startup, or operations support experience within water or wastewater treatment facilities (municipal or industrial required)
• Hands-on experience with treatment processes such as biological treatment (activated sludge), membrane systems (MBR), filtration, disinfection, and sludge processing preferred
• Working knowledge of AWWA standards, WEF practices, and OSHA requirements as applied to treatment plant construction and startup
• Demonstrated ability to execute field commissioning for process equipment, pumping systems, and plant-wide controls (PLC/SCADA)
• Experience coordinating subcontractors, OEMs, and owner representatives during multi-phase plant startup
• Ability to manage multiple systems concurrently in schedule-driven commissioning environments
• Strong proficiency reading P&IDs, control schematics, and process documentation
• Clear, direct communication in field and client-facing environments
• Proven track record of safety, quality control, and regulatory compliance during plant commissioning and startup

Core Responsibilities

• Serve as primary on-site liaison for owner/operators, EPC teams, subcontractors, and equipment vendors during commissioning of water and wastewater treatment systems
• Coordinate pre-commissioning and commissioning activities across treatment processes including headworks, screening, grit removal, primary/secondary treatment, filtration, disinfection, sludge handling, and pumping systems
• Lead system walkdowns, punch list development, and turnover package completion for process, mechanical, and electrical/instrumentation scopes
• Execute commissioning plans for pumps, blowers, clarifiers, chemical feed systems, UV/chlorination systems, and SCADA/controls integration
• Perform functional testing, loop checks, wet testing, and process start-up to validate system performance against design intent and regulatory requirements
• Track and drive punch list items to closure to achieve mechanical completion, substantial completion, and final acceptance milestones
• Coordinate system readiness across civil, mechanical, electrical, and controls scopes in a multi-discipline construction environment
• Review and interpret P&IDs, process flow diagrams, control narratives, and specifications specific to water/wastewater treatment processes
• Conduct field inspections to verify compliance with applicable standards (AWWA, WEF, OSHA, project specifications) and quality requirements
• Interface with engineering, controls integrators, and operations teams to troubleshoot process and equipment issues during startup
• Maintain detailed commissioning logs, test documentation, and turnover records required for owner acceptance and regulatory compliance