Senior HVAC Mechanical Design Engineer

Johnson Controls, Inc.; Singapore; On-site; SGD 90,000 - 130,000; Full time

Job summary

Johnson Controls, Inc. in Singapore is seeking an experienced Mechanical Engineer to provide drafting and design support for HVAC projects, taking responsibility for CAD deliverables, layout and design studies, and coordinating with clients, consultants, and vendors.

You will develop detailed drawings, perform HVAC load and piping calculations, prepare BOMs and tender documents, ensure compliance with ASHRAE and local codes, and mentor junior engineers while collaborating with sales, PM, and

Qualifications

• Bachelor's degree in Mechanical Engineering or related field.
• Minimum 5 years experience in HVAC system design including chilled water or condenser systems.
• Strong understanding of HVAC fundamentals, equipment selection and controls integration.
• Hands-on proficiency in HVAC design software (Revit, AutoCAD).
• Familiarity with hydraulic calculations and pump head computation using spreadsheets.
• Knowledge of ASHRAE, ISO and local mechanical codes.
• Experience delivering medium to large-scale commercial or industrial projects.
• Strong documentation, communication, and coordination skills.
• Professional certification (SCEM, LEED AP) is an advantage.

Responsibilities

• Develop and review detailed engineering drawings, schematics, and equipment specifications.
• Perform HVAC load, hydraulic, pump head calculations, pipe sizing and chilled water/condensate system design.
• Prepare BOMs, equipment selections and tender documentation.
• Ensure HVAC designs comply with ASHRAE standards, local codes and corporate engineering guidelines.
• Coordinate with internal teams to support pre-sales and project execution.
• Review and validate designs from consultants, contractors, and partners.
• Provide technical mentorship to junior engineers.
• Conduct site assessments, attend technical meetings, and support design reviews.
• Support troubleshooting and commissioning activities related to HVAC and hydronic systems.
• Meeting with clients and design teams to determine mechanical applications and requirements.
• Review and understand mechanical designs using CAD, CAM, and 3D CAD programs.

Skills

HVAC design

Revit

AutoCAD

Hydraulic calculations

Piping design

Project coordination

Mentoring

Education

Bachelor's degree in Mechanical Engineering

Tools

EPIC (Release coordination)

3D CAD

Job description

What you will do:

Provides drafting and design support for engineering departments by assuming full drafting and/or some design responsibility for assigned projects. May have responsibility for CAD deliverables to the customer, layout/packaging coordination, release coordination (using EPIC), and CAD studies.

How you will do it:

• Develop and review detailed engineering drawings, schematics, and equipment specifications.
• Perform HVAC load calculations, hydraulic calculations, pump head calculations, pipe sizing, and chilled water/condensate water system design.
• Prepare technical proposals, bill of materials (BOM), equipment selections, and tender documentation.
• Ensure all HVAC designs comply with ASHRAE standards, local building codes, and corporate engineering guidelines.
• Coordinate with internal teams (sales, project management, solutions engineering) to support pre-sales and project execution.
• Review and validate engineering designs from consultants, contractors, and partners.
• Provide technical mentorship and guidance to junior engineers.
• Conduct site assessments, attend technical meetings, and support design reviews.
• Support troubleshooting and commissioning activities related to HVAC and hydronic systems.
• Meeting with clients and design teams to determine mechanical applications and requirements.
• Review and understand mechanical designs using CAD, CAM, and 3D CAD programs.

What we look for:

• Bachelor's degree in Mechanical Engineering or related field.
• Minimum 5 years experience in HVAC system design, including chilled water systems or condenser system design.
• Strong understanding of HVAC system fundamentals, equipment selection, and controls integration.
• Hands‑on proficiency in HVAC design software (Revit, AutoCAD).
• Familiarity with performing hydraulic calculations and using tools/spreadsheets for pump head computation.
• Knowledge of relevant standards (ASHRAE, ISO, local mechanical codes).
• Experience delivering medium to large-scale commercial or industrial projects.
• Strong documentation, communication, and coordination skills.
• Professional certification (SCEM, LEED AP) is an advantage.