About the role
Category: Architecture & Construction
Location:
Remote Mechanical Estimator - with Simpro Experience (Dayshift, WFH)
Company : AU HVAC
Work schedule: Dayshift, 10AM-7PM AEST
Target start date: ASAP
VA rate: $11-12 AUD
Full time, 40 hours
JOB DESCRIPTION: We are seeking an experienced HVAC / Mechanical Estimator to support our growing portfolio of high-quality hydronic heating, air conditioning, and mechanical projects. This role is ideal for a technically strong, detail-oriented professional with proven experience in mechanical design and estimation for Australian projects.
You’ll work directly with the Director on technical matters and collaborate closely with the Office Manager (Project Admin/Coordinator) for day-to-day inquiries, client communications, and project administration.
Responsibilities:
Estimating & Design
Prepare accurate estimations, designs, and take-offs for HVAC, hydronic heating, and airconditioning systems.
Perform pipework design, flow calculations, and thermal load assessments (heat loss/gain,pump and heat pump sizing).
Build and maintain estimating templates, cost libraries, and take-off lists.
Use H2X for mechanical design and calculations.
Operate within SimPRO for job costing, quoting, and project workflows.
Project Support
Draft and review project documentation and mechanical specifications.
Assist with tenders, proposals.
Track and compare estimates against actual project outcomes to improve accuracy.
Introduce value engineering and alternative design/materials for cost and performance optimisation.
Supplier & Subcontractor Coordination
Maintain communication with suppliers for updated pricing and availability.
Compliance & Standards
Ensure all designs and estimates comply with relevant Australian codes and standards
(particularly NSW, ACT, VIC).
Collaborate with internal teams to ensure feasibility, compliance, and best-practice design solutions.
Requirements:
Mechanical engineering background, or strong hands-on estimating experience in HVAC / hydronic heating / heat pump / geothermal systems.
Minimum 2 years of estimating/design experience in HVAC, hydronic, or mechanical engineering.
Strong knowledge of hydronic heating, air conditioning systems, and pipework design.
Proficiency with H2X and SimPRO (or proven ability to learn quickly).
Demonstrated experience working on Australian mechanical projects
Excellent English communication skills (verbal & written) – able to interact confidently with clients, builders, and the internal team.
Highly organized, detail-oriented, and able to manage multiple estimates and deadlines.
Comfortable working remotely with direct reporting lines to senior management.
Nice to Have
Background in mechanical engineering or trade qualification in HVAC.
Prior experience in hydronic systems specifically.
Strong supplier and subcontractor networks in Australia.
Details
Originally posted on Himalayas