Mechanical Design Engineer

About You

We are looking for a HVAC Engineer to join our growing team in St. Louis (Richmond Heights). You will be responsible for the design and engineering of HVAC and mechanical systems from concept through construction. The ideal candidate is a proactive problem solver who thrives in a collaborative environment and brings both technical knowledge and a practical mindset to each project.

• Industry-leading performance-based bonus program
• 100% employer-funded ESOP to all associates
• 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 and 100% charitable match
• Medical, dental, and vision insurance coverage
• 3 weeks of vacation
• 100% paid 12-week maternity leave

• Design HVAC and mechanical systems for commercial and industrial buildings
• Prepare drawings, specifications, and equipment schedules in Revit and AutoCAD
• Perform load calculations, equipment selection, and ductwork layouts
• Coordinate with architects, structural engineers, clients, and subcontractors to integrate MEP systems into overall building design
• Attend design meetings and construction coordination sessions as needed
• Assist with code compliance reviews and permitting documentation
• Manage multiple deadlines and adapt to evolving project scopes

• Bachelor s degree in Mechanical Engineering or related field
• 3-8+ years of mechanical design experience in commercial or industrial sectors
• Design-build project delivery experience is highly preferred
• Proficiency in Revit, AutoCAD, and mechanical load calculation tools (e.g., Trane Trace, HAP)
• Strong knowledge of IMC, ASHRAE standards, and relevant energy codes (e.g., Title 24, IECC)

ARCO is a premier, full-service design-build general contractor with more than 30 years of experience providing clients with complete project delivery nationwide. With over 6,000 projects completed coast to coast, we pride ourselves on offering cost-effective, turnkey solutions and adding value to every project. ARCO is 100% associate-owned through an ESOP, so each associate holds a stake in the company.

ARCO is consistently recognized as a top workplace in multiple markets nationwide and is ranked by Engineering News-Record as a top ten design-build firm and the largest domestic builder of distribution and warehouse space.

ARCO does not accept unsolicited resumes from third-party agencies or individual recruiters without prior approval. Any unsolicited resumes become ARCO property, and no fees will be paid for any placement resulting from the receipt of an unsolicited resume. Agencies must have a fully executed vendor agreement with ARCO and written approval from the ARCO Talent Acquisition Manager before submitting candidates.

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EOE, including disability/vets