Senior Mechanical Engineer ( 3-5 years Experience )

3S MEP; Chicago (IL); Hybrid; USD 95,000 - 130,000; Full time

Job summary

3S MEP is seeking a Senior Mechanical Engineer with 4+ years of US-based experience in HVAC and plumbing for commercial, healthcare, residential and hospitality projects in Chicago.

You will lead design development from concept through construction documents, coordinating with architects, structural engineers, and clients to deliver code-compliant, high-quality solutions. Experience with Chicago Building Code and ASHRAE is preferred.

Qualifications

• Minimum 4 years of mechanical engineering experience in building systems.
• Strong HVAC and plumbing design experience.
• Proficiency in AutoCAD, Revit MEP, and HVAC load calculation tools.
• Ability to manage multiple projects with tight deadlines.

Responsibilities

• Lead HVAC and plumbing system design, including load calculations, ductwork, piping, and layout development.
• Define project scope, schedules, resources, and deliverables across multiple assignments.
• Prepare complete design packages with accuracy and technical quality.
• Coordinate with architectural, structural, and other engineering disciplines.
• Communicate with clients and vendors regarding design requirements and equipment specifications.
• Ensure compliance with applicable codes and standards including Chicago Building Code, IMC, IBC, NFPA, and ASHRAE.
• Evaluate design alternatives for efficiency, cost, and lifecycle performance.
• Review shop drawings, respond to RFIs, and support construction-phase coordination.
• Develop schematic designs, sequences of operation, and BMS I/O summaries.

Skills

HVAC design

Plumbing design

AutoCAD

Revit MEP

Load calculations

Project coordination

Tools

Carrier HAP

Trane TRACE

Job description

We are seeking a Senior Mechanical Engineer with 4+ years of US-based experience in HVAC and Plumbing design across commercial, healthcare, residential, hospitality, and restaurant projects. Experience in fire protection systems is a plus.

In this role, you will be responsible for leading mechanical design development from concept through construction documentation. You will work closely with multidisciplinary teams to deliver coordinated, code-compliant, and high-quality engineering solutions.

Job Responsibilities :

• Lead HVAC and plumbing system design, including load calculations, ductwork, piping, and layout development
• Define project scope, schedules, resources, and deliverables across multiple assignments
• Prepare complete design packages with accuracy and technical quality
• Coordinate with architectural, structural, and other engineering disciplines
• Communicate with clients and vendors regarding design requirements and equipment specifications
• Ensure compliance with applicable codes and standards including Chicago Building Code, IMC, IBC, NFPA, and ASHRAE
• Evaluate design alternatives for e2iciency, cost, and life-cycle performance
• Review shop drawings, respond to RFIs, and support construction-phase coordination
• Develop schematic designs, sequences of operation, and BMS I/O summaries

Job Qualifications :

• Minimum 4 years of mechanical engineering experience in building systems
• Strong experience in HVAC and plumbing design
• Proficiency in AutoCAD, Revit MEP, and HVAC load calculation tools (Carrier HAP /Trane Trace)
• Ability to manage multiple projects with tight deadlines
• Strong communication and coordination skills

3S MEP + S provides integrated MEP, Fire Protection, Fire Alarm, BIM, Energy Modeling, and Structural Engineering services for building projects.