Executive Management

Our executive management team provide strategic direction and governance for our business operations and support our senior management team in achieving our business goals.

Tom Wilmot

Tom has over forty years experience in soil stabilisation and road recycling and has been very involved in the development of pavement recycling including innovative binders and specialised equipment. He is recognised locally and abroad as a key driver in promoting research and innovation in this economical form of road construction and road recycling.

Tom has a passion for the development of sustainable principles for road construction and the conservation of natural resources. To this end he is active in promoting technology transfer in this field, particularly in the Australian and Asian regions. He has presented widely at International and Australian conferences.

Tom is a Fellow of the Institution of Engineers Australia an honorary member of AustStab and is a recipient of the John Shaw Award by Roads Australia for meritorious contribution to Roads.


Warren Smith

Warren is a qualified civil engineer and has over 40 years experience in pavement design and construction. For the last 35 years Warren has worked specifically in the stabilisation and rehabilitation industry being involved in both insitu and pugmill work. As such he has been involved in the development of the different methods and procedures of stabilised pavement design and construction in many varied situations throughout Australia and overseas. He has had a significant input in the ongoing introduction of new technologies in both stabilisation equipment and additive fields.

Warren is now one of Australia’s most experienced engineers in the fields of stabilisation and road rehabilitation and as such is frequently involved in seminars and workshops with State and Local Government Authorities, Consultants and other interested groups throughout Australia and other parts of the World including Europe, Asia and the Pacific Rim. Warren has been in the forefront of communicating the environmental benefits of using stabilisation techniques especially for recycling works

Daniel Orriss
Executive General Manager

Daniel is a qualified civil engineer who has over 15 years’ experience in the road construction and rehabilitation industry. His experience includes operations and contract management, business development and compliance.

As Executive General Manager, Daniel is responsible for managing the strategic direction and growth of the business while maintaining the core values that have assisted SPA to be a market leader for over 35 years.

Daniel is an active industry contributor through various senior relationships and is current Vice President of AustStab, the Australian Pavement Recycling and Stabilisation Association.

David Berg
General Manager

David is an experienced management representative who has provided substantial energy and direction towards SPA over an extended period of time. Drawing on an operational background, David encourages strong work ethic, has an eye for operational details and fosters relationships within SPA and throughout the industry to ensure a collaborative and informed approach to business direction.

David has been a strong contributor to the pavement recycling and insitu stabilisation industry through his service to SPA and also the industry association, AustStab, of which he is current President.

Mark Merritt
Finance Manager/Company Secretary

Mark is a qualified Chartered Accountant with over 17 years’ experience in accounting gained locally and internationally. During this time, Mark has held a number of Senior Finance positions across multiple industries and businesses, both large multinationals and small local organisations.

Mark has a proven track record in streamlining and automating processes to ensure optimal outcomes for the business. As a manager with a participative leadership style, Mark values the input from his team members and believes including his peers in the decision making process leads to better outcomes and constant improvements in processes.

Mark’s priority is to ensure both the Finance and IT functions of SPA remain focused on delivering value to the business through partnering and supporting project teams.