HVAC Design Engineer – Preconstruction & Proposal Development at Worknigeria

Worknigeria was established with a Singular Vision. To help the vast Nigerian workforce find meaningful jobs. We are also on a mission to upskill them in the best ways possible and help them grow with and within their careers.

We are recruiting to fill the position below:

Job Title: HVAC Design Engineer – Preconstruction & Proposal Development

Location: Iyana Ipaja, Lagos
Employment Type: Full-time, Onsite
Working Hours : 11am – 7pm

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 Mechanical’s 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.

Preferred Qualifications

• Bachelor’s 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.

Requirements:

• 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.

What We Offer

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

Application Closing Date
28th February, 2026.

How to Apply
Interested and qualified candidates should send their CVs to: careers@worknigeria.com using the job title as the subject of the mail.