QA/QC Engineer, Mechanical Systems & Commissioning

Arco1; Chicago (IL); On-site; USD 75,000 - 95,000; Full time

Benefits offered by this job

ESOP

401k plan (Traditional and Roth)

Relocation assistance

Tuition reimbursement

Scholarship for associates’ children

Sabbatical after five years with bonus

Volunteer leave

Medical, dental, vision

Paid parental leave

Job summary

ARCO is seeking a QA/QC Engineer to support testing, startup, setup, and troubleshooting of mechanical systems across design/build projects. The Jr. Mechanical Systems Specialist will collaborate with project teams, vendors, and subcontractors to ensure safe, functional, and reliable systems on active construction sites.

This role emphasizes commissioning support and field execution mastery. Ideal candidates have 2–5 years of experience, a technical degree in mechanical fields, and knowledge of

Qualifications

• Bachelor’s degree in mechanical engineering, mechanical engineering tech., Construction Engineering, or related technical field preferred; equivalent technical education or relevant field experience will also be considered
• 2–5 years of experience in mechanical systems operations, startup, commissioning support, service, troubleshooting, construction, or building operations
• Basic to intermediate knowledge of HVAC and mechanical building systems, including chilled water, condenser water, pumping, air distribution, and heat rejection systems
• Familiarity with mechanical equipment such as chillers, pumps, cooling towers, AHUs, CRAHs, CRACs, VFDs, valves, and related instrumentation
• Ability to read and interpret mechanical drawings, equipment submittals, and sequences of operation
• Strong mechanical aptitude and problem-solving skills with a desire to grow technical troubleshooting capabilities
• Comfortable spending time on active construction jobsites
• Familiar with construction practices and principles
• Strong communication skills and ability to work collaboratively with internal teams, subcontractors, vendors, and clients
• Proficiency in Microsoft Office Suite
• Experience with construction or commissioning software such as Procore, CxAlloy, Facility Grid, or similar platforms is a plus
• Experience in mission critical, industrial, healthcare, manufacturing, or other complex technical environments is a plus
• Relevant certifications or training related to commissioning, HVAC systems, controls, or mechanical operations are a plus

Responsibilities

• Support startup, setup, testing, and troubleshooting of mechanical systems and associated controls
• Assist with pre-startup readiness reviews to verify equipment installation, piping completion, controls integration, labeling, and general system readiness
• Participate in vendor startup activities for chillers, pumps, cooling towers, air handling units, CRAHs, CRACs, hydronic systems, and related mechanical equipment
• Help execute pre-functional checklists, startup forms, and functional test procedures for mechanical systems
• Verify mechanical equipment and systems are operating in accordance with design intent, project specifications, and sequences of operation
• Assist in troubleshooting mechanical and controls-related field issues and support resolution with subcontractors, vendors, engineers, and project teams
• Observe and document system performance including temperatures, pressures, flows, alarms, safeties, and equipment staging during testing
• Support TAB coordination and help verify systems are properly set up for balancing and performance validation
• Coordinate with BAS and controls teams to verify point functionality, alarm status, communication, and sequence execution
• Document deficiencies, testing observations, and corrective actions clearly and accurately
• Support commissioning meetings, startup planning efforts, and system turnover activities
• Communicate field findings to project managers, superintendents, engineers, and senior commissioning or QA/QC staff
• Help maintain organized project documentation related to mechanical startup, testing, issue logs, and closeout
• Promote safe work practices and support compliance with project safety requirements

Skills

Travel readiness

Reading drawings

Mechanical aptitude

Communication skills

Team collaboration

Problem solving

Education

Bachelor’s degree in mechanical engineering or related field

Tools

Procore

CxAlloy

Facility Grid

Job description

ARCO is seeking a QA/QC Engineer to support testing, startup, setup, and troubleshooting of mechanical systems across design/build projects. The Jr. Mechanical Systems Specialist will collaborate with project teams, vendors, and subcontractors to ensure safe, functional, and reliable systems on active construction sites.

This role emphasizes commissioning support and field execution mastery. Ideal candidates have 2–5 years of experience, a technical degree in mechanical fields, and knowledge of