Commercial HVAC Sales Executive

ISS Mechanical; Florida; On-site; USD 140,000 - 210,000; Full time

Job summary

ISS Mechanical in Florida seeks a Senior HVAC Sales Engineer to lead estimating and the technical development of large-scale projects. You will own sales opportunities, conduct job walks, assess feasibility, and prepare detailed estimates and proposals for commercial HVAC systems.

This hands-on role requires deep HVAC knowledge, strong client-facing skills, and collaboration with sales, service, and operations teams to ensure accurate scopes and successful project handoffs.

Qualifications

• 10+ years of commercial HVAC experience including estimating, solution selling, and large-system projects.
• Strong understanding of HVAC system design, controls, and performance.
• Proficient with mechanical plan reviews and blueprint takeoffs.
• Experience estimating mid- to large-scale mechanical replacement projects.

Responsibilities

• Conduct detailed site assessments and job walks to evaluate conditions and requirements.
• Prepare detailed cost estimates, labor projections, and material takeoffs.
• Collaborate with sales to develop technical scopes and competitive pricing.
• Represent ISS Mechanical during client meetings and site walks.
• Coordinate with project managers, service leaders, and field personnel to ensure smooth handoffs.

Skills

HVAC system design

Sales & client-facing

Estimating proficiency

Blueprint takeoffs

Communication (verbal & written)

Collaboration

Tools

Estimating software

Microsoft Excel

AutoCAD/Bluebeam

Job description

ISS Mechanical is hiring a Senior HVAC Sales Engineer to lead the estimating and technical development of large-scale mechanical projects. This position is ideal for a highly skilled HVAC professional with deep knowledge of complex systems, a strong background in estimating, and excellent client-facing skills. You will play a pivotal role in scoping, estimating, and supporting the successful execution of projects in collaboration with our sales, service, and operations teams.

Role Summary

The Senior Sales Engineer will be responsible for conducting job walks, evaluating project feasibility, and developing detailed estimates and proposals for a wide range of commercial HVAC systems in existing buildings. A significant portion of time will be dedicated to owning sales opportunities by analyzing job site conditions and client needs, building trust with clients, and proposing well-structured solutions. This position requires a hands‑on, experienced technical sales professional who thrives in a fast‑paced, collaborative environment.

Key Responsibilities

• Project Site Assessments:
  Conduct detailed mechanical walk‑throughs to evaluate site conditions, identify project requirements, and determine the best approach for system replacements or upgrades.
• Technical Estimating:
  Prepare detailed cost estimates, labor projections, and material takeoffs based on construction drawings, specs, and site observations. Systems to estimate include:
  • Air‑Cooled and Water‑Cooled Chillers
  • Hydronic and Steam Piping Systems
  • Custom Air Handling Units (AHUs)
  • Variable Air Volume (VAV) Systems
  • Rooftop Units (RTUs) up to 100+ Tons
  • VRF/VRV Systems and Split Systems
  • Cooling Towers
  • Make‑Up Air and Exhaust Systems
  • Large‑Scale Ductwork Systems and Controls Integration
• Sales Team Support:
  Collaborate closely with sales representatives to develop technical scopes and competitive pricing for opportunities. Provide expert input on design approaches and system applications.
• Client Engagement:
  Represent ISS Mechanical during site walks and client meetings. Explain project scopes and mechanical options clearly to both technical and non‑technical audiences.
• Internal Collaboration:
  Partner with project managers, service leaders, and field personnel to ensure a smooth project hand‑off and alignment with estimating details.

Qualifications

• Experience:
  10+ years of commercial HVAC experience, with extensive knowledge of estimating, offering solutions, and selling large systems across a variety of building types.
• Technical Skills:
  • Strong understanding of HVAC system design, controls, and performance
  • Proficient with mechanical plan review and blueprint takeoffs
  • Experience estimating mid‑to large‑scale mechanical replacement projects
• Soft Skills:
  • Strong verbal and written communication skills
  • Client‑focused approach with the ability to build rapport and influence decisions
  • Collaborative mindset with attention to detail and follow‑through
• Tools & Technology:
  Familiarity with estimating software, Microsoft Excel, and mechanical design platforms (AutoCAD, Bluebeam, etc.)

Core Values We Live By

At ISS Mechanical, we hire for more than just technical ability. We expect our team to lead with integrity and align with our values every day:

• Teamatude – We support each other and win as a team.
• Raving Fans – We go above and beyond to deliver exceptional client experiences.
• Drive – We show up with energy, initiative, and a commitment to excellence.
• Upstanding – We do what’s right, even when no one’s watching.
• Ownership – We take responsibility for our work, results, and impact.
• Hive – Every person doing their job matters for the collective success.

Why ISS Mechanical?

It starts with the people. At ISS Mechanical, you’ll work alongside a team of experienced, skilled professionals who take pride in doing things the right way. We collaborate, back each other up, and bring our best to every job—no egos, just excellence. We’re grounded in strong core values that guide our decisions from start to finish.