The Mechanical Engineer III is a senior-level role responsible for leading and executing complex mechanical design and project management tasks across a diverse portfolio of projects. They work with minimal oversight, this position serves as both a technical leader and collaborative team member, providing expertise in HVAC and building systems design.
Typical responsibilities include performing advanced HVAC design and load calculations, developing hydronic system layouts with flow and pressure calculations, and selecting and specifying mechanical equipment. Additional duties include designing fire protection systems, coordinating underground utilities, and producing high-quality specifications and construction documents. The Mechanical Engineer III ensures all designs meet applicable codes, standards, and client requirements while delivering innovative, cost-effective solutions.
What you will do:
Lead or support mechanical engineering design for a variety of building projects with minimal oversight
Perform HVAC system load calculations, equipment sizing, and energy efficiency analysis
Design hydronic systems, perform flow and pressure calculations, and select appropriate pumps and piping configurations
Develop fire protection system layouts and coordinate with other disciplines for integration
Coordinate underground mechanical utilities with civil, structural, and other site-related work
Prepare detailed drawings, specifications, and construction documents using Revit and AutoCAD
Ensure all designs comply with applicable codes, standards, and project requirements
Review and approve mechanical engineering calculations, drawings, and specifications
Participate in multidisciplinary coordination meetings with architects, engineers, and contractors
Provide construction administration support, including reviewing submittals, responding to RFIs, and performing site visits
Mentor junior engineers and designers, providing technical guidance and quality review
Manage portions of projects including budgets, schedules, and deliverables
Who you are:
Four-year bachelor’s degree in mechanical engineering from an ABET accredited institution
6-8 years of experience in mechanical engineering required
Licensed Professional Engineer (PE) required
Proficiency in HVAC and hydronic system design, calculations, and equipment selection
Knowledge of fire protection system design and underground utility coordination
Strong understanding of mechanical codes and standards (ASHRAE, NFPA, IMC, IPC)
Skilled in Revit and AutoCAD for MEP system modeling and documentation
Ability to develop detailed engineering specifications and construction documents
Experience with project management, including scope, schedule, and budget oversight
Strong multidisciplinary coordination skills with other engineering and architectural disciplines
Excellent problem-solving, attention to detail, and quality control abilities
Effective verbal and written communication skills for client and team interaction
Ability to mentor junior engineers and work independently with minimal supervision
At Milhouse, we’re more than just a place to work — we’re a place to grow, thrive, and be celebrated. Here’s how we invest in you:
- Medical, Dental & Vision Coverage – Reach out to learn how your deductible could be covered 100% through Garner Health!
- Company Sponsored Life Insurance and Short-Term Disability – We’ve got your back when life takes unexpected turns.
- Voluntary Coverages – Take control of your well-being with added coverage options.
- Discounted Gym Membership – Stay active with wellness options that support your fitness goals.
- Competitive Base Salary – Earn what you're worth in a performance-driven culture.
- 401(k) Retirement Plan – Build your future with confidence.
- Professional Development Incentives – Get rewarded for growing your skills — including bonuses for earning your P.E. License.
- Milhouse University (Cross-Functional Training) – Expand your expertise with internal training built to elevate your career and receive PDH credits for applicable training towards professional engineering licenses, etc..
- Employee Education & Development Program – Tuition assistance and learning opportunities to keep you moving forward.
- Generous PTO + Paid Holidays – Rest, recharge, and enjoy the moments that matter most.
- Paid Parental Leave – Bond with your new arrival — and yes, we’ll even cover a year of diapers!
- Extracurricular Sports Teams – Join our summer Volleyball and Softball squads for fun off the clock.
- Employee Recognition Program – Be celebrated for the impact you make.
- Employee Referral Bonus – Bring great people on board and get paid for it.
- Transit Benefits Program – Save on your daily commute.
- Charitable Events and Activities offered through non-profit affiliate – Milhouse Charities.
Skills Required
- Bachelor's degree in Mechanical Engineering (ABET-accredited)
- 6-8 years of mechanical engineering experience
- Licensed Professional Engineer (PE)
- Proficiency in HVAC system design, load calculations, and equipment sizing
- Experience designing hydronic systems, flow and pressure calculations, pump and piping selection
- Knowledge of fire protection system design
- Experience coordinating underground mechanical utilities with other disciplines
- Strong understanding of mechanical codes and standards (ASHRAE, NFPA, IMC, IPC)
- Skilled in Revit and AutoCAD for MEP modeling and documentation
- Ability to develop detailed specifications and construction documents
- Experience with project management: scope, schedule, and budget oversight
- Strong multidisciplinary coordination and communication skills
- Ability to mentor junior engineers and provide technical guidance
- Ability to work independently with minimal supervision and perform quality control
What We Do
Milhouse Engineering and Construction, Inc. is a multidisciplinary enterprise founded in 2001 that provides full-service engineering design, construction, program management, vegetation management, and real estate development solutions. Serving the utilities, facilities, and transportation industries, the firm is dedicated to delivering creative solutions to complex problems, challenging the status quo, and making a positive impact on communities around the world through its diverse team of professionals.
