Mechanical Engineer, PE

Tetra Tech; Atlanta (GA); On-site; USD 95,000 - 130,000; Full time

Benefits offered by this job

Benefits package

Merit-based rewards

Work-life balance

Collaborative culture

Professional development

Job summary

Tetra Tech is seeking a Mechanical Engineer, PE in Atlanta to contribute to mechanical system design for water and wastewater facilities. You will develop design documents, calculations, and specifications, collaborating with project managers to produce build-ready packages.

This role offers growth within a supportive team and opportunities to advance your professional licensure and technical expertise while delivering reliable infrastructure.

Qualifications

• 5–10 years in mechanical design for mechanical, plumbing, and performance-based fire protection systems.
• PE license required or in progress.
• Familiarity with building codes, ASHRAE design manuals/guides, and LEED requirements.

Responsibilities

• Lead mechanical system designs from concept through construction with guidance from an EIT.
• Perform HVAC load calculations, energy models, life cycle cost analyses, and ventilation calculations.
• Size equipment and develop layouts for HVAC and plumbing systems.
• Review and edit construction specifications (MasterSpec) for applicable projects.
• Participate in construction administration, respond to RFIs, review shop drawings, and observe sites.

Skills

HVAC design

Construction documents

Energy modeling

Code familiarity

Education

Bachelor’s degree in mechanical engineering

Professional Engineer (PE) License

Tools

REVIT/BIM

AutoCAD

Job description

Tetra Tech is adding a Mechanical Engineer, PE to our teams in Atlanta.

Why Tetra Tech:

At Tetra Tech, we are Leading with Science to solve the world’s most complex challenges. Our industry-leading experts in engineering and consulting are committed to driving positive change in communities around the world. For over 50 years, we have been at the forefront of innovation and sustainability. Today we stand as a market leader, offering cutting‑edge solutions in water, environment, energy, and international development. Our work has improved more than 625 million lives around the world.

Your Impact:

Join Tetra Tech to make a real difference. Our work leverages cutting‑edge technologies, advanced analytics, and the expertise of world‑class scientists and engineers to create meaningful change around the world. Discover your full potential - join us to advance your career while leaving a lasting legacy.

Position Summary:

As a Mechanical Engineer, you’ll contribute to mechanical systems design for industrial, commercial, wastewater, and water facilities. Your work will span system expansions, total replacements, and new facility construction. This person will work closely with project managers and mechanical leadership to assist with the development of design documents including engineering reports, calculations and analysis, drawings, specifications, and the engineer’s opinion of probable construction costs.

As a member of the Tetra Tech Mechanical Team, you will encounter exceptional growth opportunities. Tetra Tech is dedicated to investing in its people, offering support for a variety of career paths.

Essential Job Functions:

• You will lead mechanical system designs from concept phase through construction with the assistance of an EIT including the development of construction documents.
• Perform HVAC load calculations, energy models, life cycle cost analysis, and ventilation calculations in compliance with applicable codes and energy efficiency standards.
• Size equipment and develop layouts for HVAC (airside and hydronic) and plumbing systems.
• Review and edit construction specifications using MasterSpec for each applicable project.
• Participate in construction administration. Responsibilities include responding to contractor RFIs, reviewing shop drawings, and handling construction submittals. Conduct construction site field observations and prepare punch lists during various stages of construction.

Required Qualifications:

• 5 to 10 years in mechanical design, specifically related to design and construction documentation for mechanical, plumbing and performance-based fire protection systems in new and existing facilities.
• Bachelor’s degree in mechanical engineering or a related field.
• Professional Engineer (PE) License.
• Familiarity with building codes, ASHRAE design manuals and guides, and USGBC LEED requirements, specifically for new or existing facilities.
• Basic knowledge of building mechanical equipment is desired. Some examples include fans, chillers, cooling towers, air handlers, chilled and hot water loops, boilers, motors, pumps, variable speed drives, direct digital temperature controls and building automation systems. Plumbing and/or performance fire‑protection experience also desired.

Preferred Qualifications:

• REVIT/BIM and AutoCAD experience.

Physical Requirements:

• Ability to remain in a stationary position for extended periods while working at a computer.
• Ability to move about in an office environment to access files, equipment, and meet with colleagues.
• Ability to visit active construction sites, which may involve walking on uneven terrain, climbing stairs or ladders, standing for extended periods, and navigating areas with limited accessibility.
• Ability to lift and carry up to 25 pounds of drawings, field equipment, or related materials as needed.
• Ability to observe details during site visits, including mechanical systems, equipment installations, and construction activities.
• Ability to communicate clearly in person, over the phone, and in writing

Additional Information

This position requires periodic travel, approximately 15% or more

The perks of working at Tetra Tech include:

Comprehensive and market‑competitive benefits.

Merit‑based financial rewards.

Flexibility and company‑wide commitment to work/life balance.

Collaborative team atmosphere that values the contributions of all employees.

Learning and development opportunities for ongoing professional growth.

About Tetra Tech:

Tetra Tech is the leader in water, environment, and sustainable infrastructure, providing high‑end consulting and engineering services for projects worldwide. With 30,000 employees working together, Tetra Tech provides clear solutions to complex problems by Leading with Science to address the entire water cycle, protect and restore the environment, design sustainable and resilient infrastructure, and support the clean energy transition.

Tetra Tech is proud to be an Equal Opportunity Employer. All qualified candidates will be considered without regard to race, color, religion, national origin, age, disability, sexual orientation, gender identity, status as a protected veteran, or any other characteristic protected by law. Tetra Tech is a VEVRAA federal contractor and we request priority referral of veterans.

We invite applications from all interested parties.

Explore our open positions at https://www.tetratech.com/careers. Follow us on social media to learn more about our people, culture, and opportunities: