Johannesburg: Mechanical Design & Estimation Engineer – ECSA (Pr. Eng) – HVAC – Johannesburg

About the Role

We are seeking a Mechanical Design & Estimation Engineer to join our Estimation Department in Johannesburg. The role involves developing detailed designs and preparing accurate cost estimates for mechanical systems in MEP/EPC projects, such as HVAC, plumbing, fire protection, and other related mechanical systems. The ideal candidate will combine strong technical expertise in mechanical engineering with the ability to deliver competitive, compliant, and cost-effective tender submissions.

Key Responsibilities

• Read carefully the projects specifications, identify relevant codes and standards (e.g., SANS, ASHRAE, ISO, NFPA) to have a clear understanding of the design inputs and ensure conformity to requirements.
• Plan and prioritize own work so as to deliver the expected outputs on time, in accordance with supervisors guidance.
• Perform load calculations, equipment sizing, and detailed design for HVAC, plumbing, fire protection, and other related mechanical systems.
• Perform design modelling, prepare accurate calculation notes, and develop detailed designs according to the related design manual and predefined design concepts, ensuring error-free, timely, and well-presented deliverables.
• Ensure designs are coordinated with other disciplines (electrical, civil, structural) to eliminate clashes.
• Prepare and update materials take-offs, ensuring design quantities and specifications remain within the allocated project budget.
• Prepare and review technical drawings, schematics, and as-built documentation; develop as-built drawings for executed works; and prepare Operation & Maintenance (O&M) manuals while supporting project teams with technical inputs during execution.
• Communicate professionally through internal correspondence, reports, and meetings, coordinating with relevant departments to provide technical support or receive direction.
• Conduct internal presentations on technical subjects to enhance presentation skills, prepare for external presentations, and share knowledge with colleagues.
• Support other departments and guide CAD operators to ensure delivery of high-quality outputs.
• Perform QA/QC activities on own and peers designs to detect, analyze, and eliminate discrepancies, while positively accepting feedback and applying lessons learned to continuously improve skills and prevent recurring mistakes.

Requirements

• B. Engineering Mechanical degree or equivalent
• Registration with ECSA | Pr. Eng.
• 5 years experience in design/estimation
• Strong understanding of engineering standards, including South African (SANS) and relevant international codes such as ASHRAE, NFPA, and ISO
• Proficiency in reading and interpreting mechanical design drawings and schematics, with a strong understanding of core mechanical engineering principles and systems
• Operational experience and familiarity with HVAC, plumbing, fire protection, and related mechanical systems
• Experience with design and estimation software (e.g., AutoCAD, Revit MEP, HAP, or equivalent)
• Exposure to procurement, supplier evaluation, and cost analysis processes

Qualifications

• Formal education/certifications: None mentioned in the original description.

Salary & Benefits

• R49K to R65K