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Senior Accountant

David Macartney

Omnis Business Advisory

David joined Omnis in 2022, bringing his diverse accounting experience across public practice, regional and boutique firms. His expertise spans business advisory, investment property management and small and medium enterprise (SME) solutions. With a particular focus on the building and construction industry, David specialises in helping clients with property development projects, employee share schemes and capital gains tax (CGT) strategies.

David’s approach combines meticulous attention to detail with a commitment to building long-term, trusted relationships. His extensive background includes working with Indigenous communities, medical professionals, and large-scale hotel and pub groups, providing tailored financial solutions for businesses of all sizes and sectors.

Outside of work, David enjoys exploring the Australian coastline through camping and 4×4 adventures, as well as fishing and crabbing. A dedicated AFL fan, he supports the Geelong Football Club.

Areas of Expertise:

  • SME Accounting and Business Advisory

  • Capital Gains Tax (CGT)

  • Employee Share Schemes

  • Business Acquisitions, Sales, Restructures and Rollovers

Industry Specialisations:

  • Not for Profit (NFP)

  • Building and Construction

  • Property Development

  • Investment Properties and Short-Term Rentals

  • Medical Practitioners and Specialists

  • Hotel and Hospitality Operations

Qualifications & Memberships:

  • Bachelor of Commerce (BCom), Accounting and Business/Management Deakin University

  • Chartered Accountant (CA) Chartered Accountants Australia & New Zealand

  • Member of The Tax Institute

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Omnis is a strategic accounting and financial planning firm that understands you and your business, and helps you maximise the opportunity you have.

We go beyond numbers and are driven by insight, guidance, and a personalised approach tailored to your unique needs.

Contact Us

Street address:
Level 2, 7 Rheola Street, West Perth WA 6005

Phone Number:
08 9380 3555

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Liability limited by a scheme approved under Professional Standards Legislation.

Justin Flavel

Managing Director

Justin’s experience spans across 20 years in accounting, financial analysis and general business practice.

Although born and bred on the land, Justin’s interest was more in spreadsheets, ledgers, and finance which led him to attend university. In 1992, Justin graduated with a Bachelor of Business majoring in Accounting and Finance. As well as qualifying as a CPA member and becoming a Fellow of the Taxation Institute of Australia, he began gaining practical experience in small and mid-tier accounting practices.

During the late 90s, Justin decided to expand his horizons and travel through Europe. It was during this time that he seized the opportunity to expand his knowledge on the workings of large organisations by taking on roles in multinational corporations.

Today, Justin’s passion is in facilitating businesses to grow and evolve. His focus is on acting in the role of business mentor to help clients develop the full potential of their businesses. He joins clients on their unique journey, and provides the tools and knowledge they need along the way to make the right decisions.

Justin’s aim for his clients parallels his own philosophy and personal journey—focusing on his own career growth and business success while maintaining balance in his life with his wife and three daughters.

Omnis Group Managing Director - Justin Flavel