About CMA

Continuous Mixers Australia Pty Ltd is a family owned and operated business specialising in soil and aggregate mixing and stabilisation. Company Directors, Adrian Castle and Graham Castle provide a unique blend of operational experience.

Graham Castle

Graham brings to the company 21 years experience within the Civil Engineering industry, undertaking multi-million dollar projects throughout the world, specialising in Pavements.
Graham Castle

Previous positions held by Graham include the following:
Louis Berger Group/USAID Sudan - Section Manager
Gulf Leighton Abu Dhabi – Pavement Superintendent
Leighton Contractors WA – Pavement Superintendent
Leighton Contractors India – Pavement Superintendent
Louis Berger Group/USAID Afghanistan – Section Manager
Belmadar Construction QLD – Pavement Superintendent
Leighton Asia Philippines – Pavement Superintendent
Airfield Works JV Hong Kong – Pavement Supervisor


Adrian Castle

Adrian has a wealth of business experience having successfully owned and run his own business for the past four years in the customer service environment. This experience has allowed him to have an open-minded view to business and focus on clients’ specific needs.  Adrian has strong team management skills specialising in training and development and has vast experience undertaking financial responsibility aligned with the operation of various business units.

Adrian Castle

Adrian is currently the Managing Director of Sleepy Hollow Investments and has previously held numerous management positions in the Financial, Recruitment and Hospitality sectors.