Mechanical Engineer III

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. 

• 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

• 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

• 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

•  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.  

Milhouse is a pay transparency non-discrimination organization committed to fostering an inclusive and equitable workplace. We ensure that all employees are compensated fairly and without bias, in accordance with applicable laws and regulations. In compliance with the Illinois Equal Pay Act, effective January 1, 2025, we include pay scales and benefits in all job postings and ensure that all promotion opportunities are communicated to current employees within 14 days of external postings. Additionally, we participate in E-Verify to confirm employment eligibility and uphold compliance with federal requirements.

Here's a little information on Milhouse Engineering and Construction, Inc.:

Milhouse Engineering and Construction, Inc. was founded in 2001 with the goal of building the best engineering company in the country. It was based on the belief that if we hired great people, fueled their passion while challenging them to excel, and maintained a laser focus on the needs of your clients, success would come- and so it has. Our portfolio of successful projects continues to grow, our family of highly satisfied clients continues to expand, and our staff just gets better and better.

We are a unique, Chicago-based firm whose collective passion, vision and expertise has led to phenomenal growth! With more than 500+ talented professionals and offices across the globe, Milhouse offers a dynamic work environment where there is no limit to what you can achieve if you are willing to go after it.

Our people are the cornerstone of our organization, and key to our success. Join a remarkably talented team that shares a passion for what they do and a vision for improving communities around the world through innovative engineering and construction. Click here to see who we are, and how our people drive our culture each & every day.

Click here to see all of our awards and how many times we've won Chicago’s 101 Best & Brightest Companies to Work For!

Important Notice to US Applicants

Milhouse Engineering and Construction, Inc. is an at-will employer.

We are an Equal Opportunity Employer.