Who We Are

About Armstrong Muller Consulting

Founded in 1995 by Trevor Armstrong and David Muller, Armstrong Muller Consulting was built upon the delivery of quality service for all clients in a professional, appropriate, and ethical manner. Since then, we have been partnering with a wide range of stakeholders across Australia to tackle intricate business and organisation challenges.

Armstrong Muller Consulting uses a sub-contract model whereby we engage a high quality team that is well regarded in their area of specialty and that matches the specific needs of our client. Our team often have a mix of professional backgrounds and qualifications, which enables us to focus on solutions. 

Armstrong Muller Consulting has worked as part of a larger team in various roles over an extended period. As a result, we
have extensive networks and client relationships around Australia.

Our Commitment

Values &Intention


Approachable; integrity; client satisfaction.

Why choose Armstrong Muller

We bring a different perspective.
We care about the end result.

Our Difference


Delivering results

  • Through tailoring services and “partnering” with our clients
  • Through responsive, high quality service
  • Through frankness
  • Through bringing a different perspective gained from doing this work for many years

Importantly we are independent of conflicts and have no entwined service obligations so that we can focus on your priorities.

Our team offers expertise in

  • Developing strategies and implementation plans
  • Regional and industry economic development planning
  • Conducting business and organisational reviews
  • Conducting program evaluations
  • Delivering sustainable outcomes for clients.

Our People

Meet The Team

David Muller
Co-founder and Principal

David has specialised in Management Consulting and Corporate Finance since 1984. Prior to
becoming the director of Armstrong Muller in 1995, he was a Senior Manager at KPMG which provided him
with the foundation of expertise required to operate his own firm.

David has gained a broad range experience from consulting with SMEs, government, and non-government organisations since 1985.  David has been Project Director on more than 60 organisational improvement, program evaluations and business planning projects over recent years.  David’s experience has resulted in the development of extensive networks across Australia. He prides himself in bringing a different perspective while collaborating with clients to provide an outcome-based approach, tailored to their challenges.

Our Partners

Organisations We Partner With

To employ further capabilities and accommodate larger capacity projects, we work closely alongside two Supply Nation accredited organisations, namely, Keogh Bay and Yaran Business Services. David Muller is an Executive Director of Keogh Bay and the General Manager of Yaran Business Services.

Further information on this organisation can be found at:

Yaran Business Services