HVAC Design Engineer (Preconstruction & Proposal Development)

Job Title: HVAC Design Engineer (Preconstruction & Proposal Development)
Location: Iyana-Ipaja, Lagos
Working Hours: 11am 8pm WAT
Job Type:Full-time ,Onsite
Role Overview
The HVAC Engineer is responsible for leading the technical response efforts for Invitations to Bid, Requests for Proposals, and detailed mechanical construction packages. The role prepares HVAC system designs, engineering calculations, bill of materials, technical narratives, drawings, cost inputs, and compliance documents required to submit complete and competitive proposal packages.
The ideal candidate is skilled in both HVAC engineering and construction estimating workflows. This position works closely with estimators, project managers, and executive leadership to create accurate, high-quality proposals that increase SMC Mechanicals win rate and ensure engineering alignment with field execution.
Key Responsibilities
ITB, RFP, and Proposal Response Preparation:

• Review bid documents, drawings, addendums, specifications, and scope narratives from general contractors.
• Generate complete HVAC technical response packages, including system descriptions, compliance matrices, and design concepts.
• Prepare preliminary HVAC layouts, equipment selections, and system schematics.
• Develop technical narratives supporting design intent, value engineering options, and constructability recommendations.
• Identify scope gaps, exclusions, clarifications, and risk factors requiring internal review.
• Support the estimating team with system design assumptions and competitive pricing strategies.
  

HVAC Engineering & System Design:

• Perform HVAC load calculations, equipment sizing, and ventilation calculations.
• Select appropriate HVAC systems (RTUs, VRF/VRV, chilled water, hot water, packaged units, exhaust, controls).
• Review and interpret mechanical codes including IMC, ASHRAE, and energy codes.
• Translate conceptual drawings into preliminary engineering documents.
• Coordinate with manufacturers to verify equipment performance and budget pricing.
  

Costing, Estimating, and Bill of Materials:

• Prepare bills of materials for ductwork, piping, equipment, and controls.
• Provide labor and material quantities using digital takeoff tools.
• Collaborate with estimators to validate cost assumptions.
• Review vendor quotes and subcontractor pricing.
  

Coordination and Stakeholder Engagement:

• Collaborate with project managers, estimators, engineers, and field teams.
• Attend pre-bid meetings, job walks, and technical calls.
• Coordinate with GCs, architects, and MEP consultants to resolve inconsistencies.
  

Quality Control & Documentation:

• Ensure proposals meet HVAC code requirements and project specifications.
• Prepare compliance documentation, schedules, engineering assumptions, and drawings.
• Maintain accurate bid files for audit and future use.
  

Requirements
Technical Skills:

• Proficiency in HVAC system design, load calculations, and equipment sizing.
• Ability to interpret mechanical drawings and specifications.
• Proficiency with HVAC tools such as Carrier HAP, Trane Trace, AutoCAD, Revit, and Bluebeam.
• Strong knowledge of IMC, ASHRAE, and energy codes.
  

Preferred Qualifications

• Bachelors degree in Mechanical Engineering or related field.
• 7+ years in Mechanical/HVAC construction or HVAC engineering.
• Experience with commercial and industrial HVAC systems.
• Registered/Chartered/Professional Engineer license or equivalent certification.
• Experience responding to ITBs/RFPs.
  

What We Offer

• Competitive salary and benefits package.
• Opportunity to work on exciting projects in a collaborative environment.
• Professional growth and development opportunities.
  

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