Mechanical Engineering Trainee Jobs in Decatur, GA

At Gresham Smith, we call it Genuine Ingenuity. Our culture is the cornerstone of who we are, and our people are at the heart of everything we do. United by our Core Purpose—to plan, design, and consult to create healthy and thriving communities—we deliver innovative solutions for life’s essential infrastructure and institutions.

What sets us apart is our dedication to care for our people, our clients, and the places we call home. We are more than a team of professionals—we’re a community built on commitment, integrity, respect, and teamwork.

Why Gresham Smith?

When you join Gresham Smith, you’re joining a place where you can connect and thrive. Our employees consistently recognize us as a Best Place to Work because we go above and beyond to ensure that you feel valued, supported, and empowered.

About You

We’re looking for someone who has:

• HS Diploma or A.S. Degree
• Minimum of 2 years of experience in commissioning, mechanical engineering, or related construction trades (Mechanical, TAB, or Controls).
• Strong knowledge of Microsoft Office Suite (specifically EXCEL), and commissioning software.
• Ability to travel frequently on a flexible schedule for national project sites AND/OR relocate to project sites for the duration of commissioning efforts.
• Adequate understanding of mechanical system installations with integration into Building Automation Systems (BAS) and advanced control platforms.
• Proven ability to function within a team environment.
• Valid Driver’s License and clean background check (drug screenings will be a requirement of the site).

Preferred Qualifications:

• Experience commissioning enterprise-level data centers for global technology organizations.
• Familiarity with Tier certification standards (Uptime Institute Tier III & IV).
• Mechanical Engineering Degree from a four-year college; EIT qualification is a plus.
• Certified Commissioning Authority (CxA) or other recognized commissioning certification (e.g., BCxP, CCP, CPMP).
• Certified Data Centre Professional (CDCP) or equivalent is a plus.
• Experience with LEED and energy efficiency standards for data centers.

This role is a unique opportunity to be at the forefront of mission-critical commissioning in the rapidly expanding data center industry. If you have the expertise and drive to ensure world-class reliability and efficiency, we want to hear from you!

About the Role

Our commissioning team specializes in commissioning the mechanical, electrical, and plumbing systems of a diverse range of facilities, including mission-critical, industrial, healthcare, aviation, commercial, and education facilities. We ensure reliability, efficiency, and quality in every project. We are seeking a Data Center Commissioning Specialist - Mechanical with experience in mechanical/HVAC data center commissioning for major technology clients.

As a Data Center Commissioning Specialist - Mechanical, you will:

• Perform on-site commissioning of critical infrastructure, including cooling systems (CRAC, CRAH, chiller plants), humidification systems, and fire suppression systems.
• Execute scope as directed by the Site Lead and the Mechanical Commissioning Lead.
• Provide timely reporting to the Site Lead and Mechanical Commissioning Lead – noting any issues or items of urgency/importance; participate in commissioning-related meetings requiring articulation on technical details.
• Train and mentor trainees on best practices for data center commissioning, including mechanical systems, TAB, and controls integration.
• Follow commissioning protocols directed by the client and supervisors.
• Execute project-specific mechanical commissioning scopes for data center environments.
• Develop and review commissioning plans, including narratives, pre-functional checklists, and functional performance tests tailored to data centers.
• Assist in schedule and coordination of commissioning site visits and deliverables for large data center projects.
• Conduct and document Factory Acceptance Testing (FAT), Site Acceptance Testing (SAT), and Integrated Systems Testing (IST).
• Monitor performance trends and analyze system reliability for Tier III and Tier IV data centers.
• Review testing, adjusting, and balancing (TAB) reports with a focus on precision cooling requirements and airflow management.
• Assess and provide recommendations for building automation systems (BAS) and controls integration.
• Prepare and submit final commissioning reports that align with major technology company expectations.
• Coordinate and work with electrical CxA counterpart in executing commissioning work.

Join Us

If you’re excited to bring your talents to a collaborative, people-first environment where you can make an impact while growing your career, we’d love to hear from you.

Here’s what you can expect:

Professional Growth: In-house Learning, Tuition Reimbursement, Licensure Support, Professional Organization Engagement.

Culture that Cares: 93% of employees say they feel cared for, and 96% are confident in our future success.

Competitive Benefits:

• Flexible Schedules & Generous PTO
• Healthcare (Medical, Dental, Vision, Wellness Programs)
• 401(k) with Company Match
• Short- & Long-term Disability, Paid Life & AD&D
• Supplemental, Critical Care, Pet, Legal & ID Theft Insurance
• Family Planning and Parental Leave
• Mass/Public Transit Program
• Telemedicine and Employee Assistance Program

Gresham Smith is an equal opportunity employer and does not discriminate. Everyone is invited to apply!

GRESHAM SMITH does not accept unsolicited resumes from recruiters, headhunters, search firms, or agencies. No referral or recruiter fees will be paid without a fully executed GRESHAM PLACEMENT SERVICES AGREEMENT (PSA) in advance. Submissions made without a PSA may be recruited and hired by GRESHAM SMITH with no financial obligation to the submitting party. Any such unsolicited resumes or candidate information sent to hiring managers or any employee becomes the property of GRESHAM SMITH.