New Homes Division – Estimating Support / Project Administration

Full-Time | Monday–Friday, 9:00am–5:00pm

Mannix is a long-established, family-owned South Australian business specialising in air conditioning, solar and electrical services. Due to continued growth in our New Homes Division, we are looking to appoint a Estimating Support / Project Administration team member to assist with the preparation and delivery of new home projects.

This role suits someone who enjoys working with plans, numbers and systems, has a strong eye for detail, and wants to build skills in estimating and project support within a stable business.

About the Role

Reporting to the New Homes Manager, you will play a key support role in the estimating and pre-construction process, including:

- Assisting with air conditioning designs for new home builds

- Completing take-offs from architectural and builder plans

- Preparing and checking documentation for quoting and job setup

- Supporting estimators and project staff with accurate data and cost inputs

- Maintaining job records, drawings and supporting information

- General project and administration support across the New Homes team

About You

We are looking for someone with:

- Excellent attention to detail and accuracy





- Solid computer skills and confidence working with plans, drawings, and spreadsheets

- A methodical approach and ability to follow processes

- Positive communication skills and a collaborative mindset

- A genuine interest in construction, estimating or building services

Experience in estimating, construction, HVAC, drafting, or administration is an advantage, but training will be provided for the right candidates.

What We Offer

- $62,000 per annum

- Employment under the Clerical Award

- Stable Monday–Friday, 9–5 hours

- Supportive, team-focused environment

- Exposure to estimating and project workflows

- Career progression opportunities into estimating, project coordination, or management roles

Why Mannix?

At Mannix, our mission is to supply value-for-money air conditioning and solar solutions while delivering exceptional customer service. As a family-owned business, we pride ourselves on long-term relationships — with our customers, builders, and our people.

You’ll be joining a company that values accuracy, teamwork, and continuous improvement, with genuine opportunities to grow your skills and career.

📌 Estimating support / Administration (Salisbury Plain)
🏢 Mannix Electrical
📍 Salisbury Plain