Senior HVAC Mechanical Design Engineer

Johnson Controls; Singapore; On-site; SGD 90,000 - 140,000; Full time

Job summary

Johnson Controls in Singapore is seeking an experienced Mechanical Engineer to lead HVAC design for mid-to-large projects. You will develop detailed drawings, perform load analyses, and prepare BOMs and tender docs, ensuring compliance with ASHRAE and local codes.

You will collaborate with sales, project management, and solutions teams, review consultant designs, and mentor junior engineers while supporting commissioning and site activities.

Qualifications

• Bachelor’s degree in Mechanical Engineering or related field.
• Minimum 5 years experience in HVAC system design, including chilled water or condenser systems.
• Hands-on proficiency in HVAC design software (Revit, AutoCAD) and calculations.

Responsibilities

• Develop and review detailed engineering drawings, schematics, and equipment specifications.
• Perform HVAC load calculations, pump head calculations, pipe sizing, and system design.
• Prepare BOMs, tender docs, and equipment selections; ensure codes and standards compliance.
• Coordinate with sales, PM, and solutions teams to support pre‑sales and project execution.
• Mentor junior engineers and participate in design reviews and site assessments.

Skills

HVAC design

Hydraulic calculations

Project coordination

CAD design reviews

Mentorship

Education

Bachelor’s degree in Mechanical Engineering

Tools

Revit

AutoCAD

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.

Johnson Controls: Enhancing the Intelligence of Buildings

Your buildings have a purpose. They are places for people to live or work. Facilities for learning or healing. Venues for entertainment and shopping. Sites for the specialized storage of tangible goods or mission‑critical data. Your buildings have a huge variety of functions; they are central to your mission. This is where Johnson Controls comes in, helping drive the outcomes that matter most. Through a full range of systems and digital solutions, we make your buildings smarter. A smarter building is safer, more comfortable, more efficient, and, ultimately, more sustainable. Most important, smarter buildings let you focus more intensely on your unique mission. Better for your people. Better for your bottom line. Better for the planet. At Johnson Controls, we’ve been making buildings smarter since 1885, and our capabilities, depth of innovation experience, and global reach have been growing ever since. Today, we offer the world’s largest portfolio of building products, technologies, software, and services; we put that portfolio to work to transform the environments where people live, work, learn and play.