QA/QC Engineer, Mechanical Systems

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

Benefits offered by this job

Industry-leading bonus program

ESOP

401k

Relocation assistance

Tuition reimbursement

Scholarship for associates’ children

Sabbatical after five years + travel

Volunteer leave

Charitable match

Health, dental, and vision insurance

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. This role is ideal for someone with 2–5 years of relevant experience who wants to grow expertise in field execution, commissioning support, and system performance verification.

The Jr. Mechanical Systems Specialist will collaborate with project teams, vendors, and senior staff to deliver safe, reliable systems and ensure compliance with design intent and

Qualifications

• Bachelor’s degree or higher in mechanical engineering or related field.
• 2–5 years of experience in mechanical systems operations, startup, or commissioning.
• Strong knowledge of HVAC systems, chillers, pumps, and controls.
• Ability to read mechanical drawings and sequences of operation.
• Proficiency with MS Office and construction/commissioning software.

Responsibilities

• Support startup, setup, testing, and troubleshooting of mechanical systems and controls.
• Assist with pre-startup readiness reviews to verify equipment installation and system readiness.
• Coordinate with BAS/controls teams to verify functionality and sequencing.
• Document deficiencies, testing observations, and corrective actions clearly.
• Support commissioning meetings, startup planning, and system turnover.
• Maintain organized project documentation for mechanical startup and issue logs.

Skills

HVAC knowledge

Reading drawings

Problem solving

Communication skills

Microsoft Office

Team collaboration

Field testing

Education

Bachelor’s degree in mechanical engineering

Tools

Procore

CxAlloy

Facility Grid

Job description

About You:

Are you passionate about quality and precision in construction projects? Do you thrive on ensuring compliance with rigorous standards while managing timelines and budgets? If the answer is, “Yes!” then we have an opportunity that will impress you. Who are we? We are ARCO, a Family of Construction Companies.

ARCO/Murray is seeking a QA/QC Engineer to support the testing, startup, setup, and troubleshooting of mechanical systems across design/build projects. This role is ideal for someone with 2–5 years of relevant experience who wants to grow their technical expertise in field execution, commissioning support, mechanical operations, and system performance verification. The Jr. Mechanical Systems Specialist will work closely with project teams, vendors, subcontractors, controls contractors, and senior technical staff to help deliver safe, functional, and reliable mechanical systems.

A Day in the Life:

• 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

Necessary Qualifications:

• Ability to travel to project sites as needed
• 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 associated 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

What We Can Offer You:

We are dedicated to the well-being of our associates and are proud to be consistently recognized as a Best Place to Work. Our compensation and benefits package not only supports our associates and their families but benefits local communities and communities around the world.

• Industry-leading performance-based bonus program
• Employee Stock Ownership Plan (ESOP)
• Traditional and Roth 401k
• Company supported relocation
• Tuition reimbursement for associates
• Scholarship for associates’ children up to $28,000 per child
• 1-month paid sabbatical after every five years of employment, plus $5,000 for travel
• 1-week paid volunteer leave each year
• 100% charitable match
• Medical, dental, and vision insurance coverage
• Paid parental leave

Typical base compensation for the QA/QC Engineer role is between $75,000.00 and $95,000.00. Candidates with extensive experience may exceed this range. In addition to base salary, the role is eligible to receive discretionary bonus compensation based on individual and company performance.

At ARCO, our first core value is to treat people fairly and do the right thing. We are committed to building and sustaining a culture that supports diversity and inclusion. We are proud to be an equal opportunity employer, and all qualified applicants will receive consideration for employment.

From recruiting, training, and hiring practices to selecting our subcontractors, we understand that diversity of all those involved in the construction process enhances our ability to deliver the best solutions to our customers. We hire the best and the brightest from across the country – constructing a team of experts in architecture, design, engineering, project management, and business services.

This represents typical base compensation for the role. Candidates with extensive experience may exceed this range. In addition to base salary, the role is eligible to receive discretionary bonus compensation based on individual and company performance.

Pay Range

$80,000—$100,000 USD

MAKE YOUR MOVE

We are proud to be one of the fastest-growing, privately-owned companies in America, celebrating over 30 years of experience as design-build experts. We have completed over 7,500 design-build projects nationwide. We ranked #9 on ENR’s Design-Build Firms list and #34 on ENR's Top 400 Contractors list of 2026. Most importantly, our clients like us, trust us, and want to do business with us. We are looking for people with the same enthusiasm, passion, and respect for the hard work that brought us to where we are today. Are you a person who can make a difference at ARCO? If the answer is “Yes!” we look forward to meeting you.

EOE, including disability/vets