Senior Mechanical Engineer

Liberty Personnel Services, Inc.; Alpharetta (GA); Hybrid; USD 120,000 - 150,000; Full time

Benefits offered by this job

Employee Stock Ownership Plan

Path to Partnership

Student debt repayment support

Flexible/hybrid work schedules

FE/PE exam support mentorship programs

Job summary

Liberty Personnel Services, Inc. is seeking a Senior Mechanical Engineer in Alpharetta, GA to own the design of high-performance building systems across commercial, institutional, and life sciences sectors.

You will lead multi-discipline projects from concept through construction, serve as primary client contact, and mentor junior engineers. You’ll work with AutoCAD, Revit, Trane Trace, Carrier HAP, and HVAC modeling tools to deliver compliant, energy-conscious designs under tight budgets and

Qualifications

• Bachelor’s degree in Mechanical Engineering required; MSME a plus.
• PE license required.
• 8+ years of lead mechanical engineering experience in MEP consulting.

Responsibilities

• Leading mechanical/HVAC design for multi-sector building projects.
• Performing and reviewing complex engineering calculations and system sizing.
• Developing mechanical plans, specifications, and technical reports.
• Ensuring designs comply with ASHRAE, NFPA, IMC, IECC and other codes.
• Reviewing shop drawings, submittals, and RFIs during construction.
• Serving as primary client contact for assigned projects.
• Managing project scope, schedule, budget, and staffing from kickoff to closeout.
• Leading coordination with electrical, plumbing, fire protection, and technology teams.
• Overseeing junior engineers and providing mentorship and technical guidance.
• Managing proposal development, project planning, and workload forecasting.
• Conducting QA/QC reviews for technical accuracy and consistency.
• Driving project efficiency and identifying opportunities for continuous improvement.

Skills

Lead mechanical/HVAC design

Client-facing communication

Project leadership

Mentorship

Education

Bachelor’s degree in Mechanical Engineering

MSME is a plus

Tools

AutoCAD

Revit

Trane Trace

Carrier HAP

HVAC modeling tools

Job description

Senior Mechanical Engineer - Own the design of high-performance building systems

Lead the systems that keep mission-critical buildings running

You design mechanical systems that can’t fail — in labs, healthcare, mission critical, and other high-performance environments.

In this senior role, you lead the full mechanical/HVAC design lifecycle, from concept through construction, for complex building projects across commercial, institutional, mission critical, life sciences, and residential sectors.

You’re the point person: for the client, for the architect, for the contractor, and for the internal MEP/FP team.

You’ll guide the work, set the standard, and protect both performance and budget under real-world constraints.

If you’re a PE with mechanical leadership experience in MEP consulting and you’re ready to own projects end-to-end, we want to talk to you.

What You’ll Work On

You’ll be at the center of multi-discipline building system projects, with a focus on:

• Mechanical and HVAC systems for commercial and institutional buildings
• Mission critical and high-performance building environments
• Life sciences, lab, healthcare, and specialized facilities
• Residential and mixed-use mechanical system design
• Integrated MEP/FP coordination with electrical, plumbing, and fire protection
• Energy-conscious, code-compliant systems (ASHRAE, NFPA, IMC, IECC)
• Complex system sizing, equipment selection, and code analysis
• Full project lifecycle from schematic through construction administration

You’ll work with tools and platforms like AutoCAD, Revit, Trane Trace, Carrier HAP, and other HVAC modeling tools.

Your challenge: deliver trusted performance for demanding clients, under tight budgets and aggressive schedules.

What You’ll Be Doing

• Leading mechanical/HVAC design for multi-sector building projects
• Performing and reviewing complex engineering calculations and system sizing
• Developing mechanical plans, specifications, and technical reports
• Ensuring designs comply with ASHRAE, NFPA, IMC, IECC and other applicable codes
• Reviewing shop drawings, submittals, and RFIs during construction
• Serving as primary client contact for assigned projects
• Managing project scope, schedule, budget, and staffing from kickoff to closeout
• Leading coordination with electrical, plumbing, fire protection, and technology teams
• Overseeing junior engineers and providing mentorship and technical guidance
• Managing proposal development, project planning, and workload forecasting
• Conducting QA/QC reviews for technical accuracy and consistency
• Driving project efficiency and identifying opportunities for continuous improvement

What We’re Looking For

• Bachelor’s degree in Mechanical Engineering or related field (MSME a plus)
• Professional Engineer (PE) license
• Minimum of 8 years Lead Mechanical Engineering experience in an MEP consulting environment
• Experience with lab, healthcare, mission critical, or other high-performance buildings
• Demonstrated experience managing projects of varying size and complexity
• Proficiency with AutoCAD, Revit, Trane Trace, Carrier HAP, and HVAC modeling tools
• Strong understanding of building systems, codes, and multidisciplinary coordination
• Excellent communication, leadership, and client-facing skills

The Experience That Will Really Get Our Attention

You’ve been the go-to mechanical lead on complex, high-stakes projects — especially mission critical, healthcare, or lab facilities — where reliability and performance matter as much as first cost. You’re comfortable in client meetings, confident in design reviews, and experienced mentoring engineers coming up behind you.

You bring a consultative mindset, solid business sense around scope/schedule/budget, and maybe even experience with sustainability frameworks and business development support.

Why This Opportunity?

This is a chance to step into a visible senior role where your designs, your decisions, and your leadership directly shape complex building projects across multiple markets.

You’ll join an established multi-discipline building systems consultancy with deep expertise in science & technology, mission critical, industrial, academic, and corporate work — and you’ll be at the center of that technical effort.

Beyond competitive pay and comprehensive benefits, you’ll have access to an Employee Stock Ownership Plan, a defined Path to Partnership, student debt repayment support, flexible/hybrid work schedules, and structured professional development and mentorship programs, including FE/PE exam support.

Professional Engineer (PE) license required.

Minimum of 8 years Lead Mechanical Engineering experience in an MEP consulting environment required.