Senior Mechanical Design Engineer (MEP)

Department: MEP    Location: Maumee, OH

About the Role

The Mannik & Smith Group, Inc. (MSG) is a people-focused, award-winning, full-service consulting firm offering a wide array of services including civil and geotechnical engineering, environmental consulting, planning, landscape architecture, agriculture, surveying, and construction support. Our talented staff of more than 650 professionals delivers integrated planning, design, engineering, and construction solutions.

MSG is growing, and we're looking for a Senior Mechanical Design Engineer who wants to make an impact—both through the projects they lead and the engineers they help develop. In this role, you'll be a key contributor in designing and delivering mechanical systems for a diverse range of projects, providing the technical expertise and leadership needed to bring ideas from concept to completion. You'll work alongside a talented multidisciplinary team to solve complex challenges, support successful project delivery, and create practical, innovative solutions for our clients.

We're looking for someone who enjoys sharing their knowledge, mentoring early-career engineers, and helping others grow. You'll serve as a trusted resource for the team, helping shape the next generation of talent while continuing to expand your own leadership skills and advance your career.

Responsibilities

• Lead mechanical design for facility and water/wastewater pump station projects, including process piping, HVAC, and equipment layouts
• Develop detailed mechanical design packages, including plans, sections, details, P&IDs, and specifications
• Perform pump and pipe flow calculations, system curve analyses, and equipment sizing for various process applications
• Design and specify heat trace systems, insulation, and freeze-protection components for facility and outdoor installations
• Evaluate and select mechanical equipment such as pumps, valves, piping, heat exchangers, and mechanical supports
• Participate in design reviews and quality checks to ensure accuracy, constructability, and compliance with project requirements
• Provide technical leadership by planning and delegating project work, mentoring junior engineers, and supporting their professional growth and development

Qualifications

• Bachelor’s degree in mechanical engineering or related discipline
• 7–12+ years of mechanical design experience in facilities, water/wastewater, pump stations, or industrial process environments
• Professional Engineer (PE) license preferred
• Strong knowledge of process piping, pump systems, flow calculations, and mechanical system design
• Proficiency in 3D modeling and mechanical design software (e.g., AutoCAD, Revit, or similar)
• Experience designing heat trace systems and freeze-protection components
• Understanding of relevant codes and standards (ASME, NFPA, IPC, AWWA, etc.)
• Ability to lead design tasks, coordinate across disciplines, and deliver high-quality construction documents
• Strong interpersonal and communication skills with the ability to guide junior staff and engage effectively with stakeholders

Benefits

• 401(k) with company match
• Health insurance with HSA option, vision, dental, life
• Flexible schedule
• Paid time off
• Referral program
• Tuition reimbursement
• Catalytic Coaching – Employees draft a development plan aimed at improving contributions in their current job and increasing the potential for other opportunities

Pay

$120,000 - $170,000 / year