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Develop HVAC project solutions, cost estimates, technical proposals, and preconstruction support for commercial projects. Serve as a technical customer contact, qualify opportunities, interpret project requirements, and collaborate with engineers, vendors, subcontractors, and sales teams. Build customer and vendor relationships while supporting value engineering, budgeting, compliance, and competitive project execution.

Develops and manages strategic relationships with general contractors and corporate customers for industrial refrigeration projects. Serves as the primary customer contact, secures invitations to bid, follows proposals through award, and coordinates internal estimating and proposal efforts. Requires strong industrial refrigeration knowledge, particularly ammonia and/or CO₂ systems, excellent communication, organization, and ownership of customer outcomes.

Eight-week summer internship in Comfort Systems USA’s Early Careers Program. Interns rotate through responsibilities, collaborate with department teams, complete business-focused research projects, develop solutions, and present final projects. Opportunities span business, finance, accounting, marketing, hospitality, IT, and other areas. Candidates should be self-directed, adaptable, effective communicators, and proficient in Microsoft Office, especially Excel.

Processes purchase orders and invoices, maintains vendor records in COINS ERP, resolves discrepancies, supports expense reports and monthly or annual closing, and assists with accounting compliance and reporting. The role also provides phone coverage and administrative support to the AP Manager and Controller. It requires strong organization, communication, problem-solving, reliability, and the ability to manage multiple priorities in a full-time, on-site environment.

Eight-week summer internship providing students with practical experience across business, finance, accounting, marketing, hospitality, IT, and related departments. Interns collaborate with teams, rotate through responsibilities, support business improvement initiatives, complete research-focused projects, propose solutions, and present a final project. Candidates should be self-directed, adaptable, strong communicators, able to multitask in a fast-paced environment, and proficient in Microsoft Office, especially Excel.

Manages strategic commercial accounts for HVAC, plumbing, and electrical service opportunities. Responsibilities include prospecting, pipeline development, territory growth, customer relationship management, estimating service projects, supporting sales and operations, and renewing or repositioning service agreements. The role requires mechanical industry knowledge or engineering education, strong communication skills, CRM and Microsoft Office proficiency, and experience working with facility and property management professionals.

Manage full-cycle recruiting for skilled trades, field operations, project management, engineering, service, and corporate roles. Source and screen candidates, coordinate interviews and offers, maintain Workday records, build talent pipelines, partner with hiring managers, attend recruiting events, support employer branding, track hiring metrics, ensure compliance, and assist with onboarding.

Coordinates billing and accounts receivable administration for a mechanical service company. Responsibilities include preparing invoices, reviewing contracts and technician documentation, calculating time-and-material charges, maintaining agreement and AR records, processing purchase orders, tracking unbilled costs, supporting month-end close, and responding to customer inquiries. The role requires strong organization, accuracy, communication, confidentiality, and proficiency with Microsoft Word and Excel.

Sell HVAC, plumbing, electrical, building automation, and water treatment services and agreements to commercial B2B customers. Generate new business through cold calling, networking, and prospecting; engage facility and property decision-makers; build market presence; manage customer relationships; present solutions; close deals; and grow revenue. The role is primarily customer-facing and involves spending significant time outside the office.