Senior Mechanical Design Engineer - HVAC

About You

ARCO/Murray Engineering is currently seeking a Senior Mechanical Engineer to join our Mechanical Engineering Design team based in Downers Grove, Illinois. This role will be responsible for guiding the full mechanical scope and leading the development of mechanical and plumbing systems in support of design/build projects that will range from Entertainment, Controlled Environment Agriculture, Industrial, Commercial, to Manufacturing facilities.

This is an incredible opportunity to join an established, but fast-growing design/build business and be part of our Mechanical Engineering Design Group. The team collaborates closely with our internal construction partners which are comprised of experienced Engineers and Project Managers with a passion for delivering exceptional results throughout the entire design/build process. If that sounds like the kind of career opportunity you are looking for, come be part of the AME way!

A Day in the Life

• Manage the design process for mechanical and plumbing systems for a variety of building types from controlled agriculture, waste to value, industrial, manufacturing, to large scale commercial
• Guide and review the design from concept design all the way to turnover and operation
• Apply knowledge of building codes, standards, and project requirements in the development of mechanical and plumbing systems design
• Use ASHRAE approved calculation methods to perform load calculations for various project/building types
• Coordinate with design and construction team to ensure the final deliverable meets the client criteria
• Generate permit and construction documents using 3D modeling software like Revit and/or AutoCAD
• Participate in project pursuits and conceptual design to assist in displaying the value of the design/build approach
• Assist the project team during construction to review any RFIs, submittals, and field challenges
• Participate in the development of standards, procedures, and training programs for the group

Necessary Qualifications

• 7 - 20 years of mechanical and/or plumbing design experience
• Bachelor-level degree in Mechanical Engineering, Architectural Engineering or related field
• Experience using Revit and AutoCAD
• Knowledge of codes, standards, and design principles for mechanical and plumbing systems
• Ability to work on multiple projects at once
• Comfortable with working in a fast-paced environment

What We Can Offer You

We are dedicated to the well-being of our associates and are proud to be consistently recognized as a Best Place to Work. Our compensation and benefits package supports our associates, their families, the causes they support and the local communities.

• Industry-leading performance-based bonus program
• Employee Stock Ownership Plan (ESOP)
• Traditional and Roth 401k
• Tuition reimbursement for associates
• Scholarship for associates' children up to $28,000 per child
• 1-month paid sabbatical after every five years of employment, plus $5,000 for travel
• 1-week paid volunteer leave each year
• 100% charitable match
• Medical, dental, and vision insurance coverage
• Paid parental leave

Pay and benefits

Typical base compensation for the Senior Mechanical Engineer role is between $80,000 and $120,000. Candidates with extensive experience may exceed this range. In addition to base salary, the role is eligible to receive discretionary bonus compensation based on individual and company

From recruiting, training, and hiring practices to selecting our subcontractors, we understand that diversity of all those involved in the construction process enhances our ability to deliver the best solutions to our customers. We hire the best and the brightest from across the country - constructing a team of experts in architecture, design, engineering, project management, and business development.

Make Your Move

We are proud to be one of the fastest-growing, privately-owned companies in America, celebrating over 30 years of experience as design-build experts. We have completed over 7,500 design-build projects nationwide. We ranked #9 on ENR's Design-Build Firms list and #34 on ENR's Top 400 Contractors list of 2026. Most importantly, our clients like us, trust us, and want to do business with us.

We are looking for people with the same enthusiasm, passion, and respect for the hard work that brought us to where we are today. Are you a person who can make a difference at ARCO? If the answer is "Yes!" we look forward to meeting you.

ARCO does not accept unsolicited resumes from individual recruiters or third-party recruiting agencies without pre-approval from ARCO's Human Resources team. Pre-approval is required before any external candidate can be submitted. ARCO will not be responsible for fees related to unsolicited resumes and for candidates who are sent directly to our hiring managers. Agencies must have a fully executed vendor agreement in place as well as written approval to submit candidates from an ARCO TA Manager for a specific position before submitting candidates.