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TMAA’s Management Committee (a.k.a. National Board)


John Cassel

TMAA President and QLD Board Member

Leveraging 30 years of construction experience, John Cassel was appointed General Manager of the Acquired Awareness group in 2020. A dedicated advocate for the Traffic Management industry for over a decade, John's passion translates into action. He has served as the Vice Chair of TMAA QLD since 2019. As President of TMAA, John provides strategic direction to ensure the association achieves its long-term goals.

John is TMAA's President, our QLD Board member and the Vice Chair of our QLD State Division.

Ph: 0400 012 056
Email: john.cassel@tmaa.asn.au


Anthony Simmons

TMAA Vice President and VIC Board member

Anthony has been part of the Traffic Management Industry for over 10 years. His Traffic Management Industry knowledge and expertise hails from working his way through the industry from Traffic Controller to his current position as Business Development Manager with Traffic Diversions Group.

Anthony is committed to the on going advancement of the industry through close consultation with Road Authorities, raising the professionalism through tiered training accreditation and believes the TMAA must continue to work towards standardisation and harmonisation across the country.

Anthony is TMAA's Vice-President, our VIC Board Member and the Chair of our VIC State Division.

Ph: 0447 175 986​
Email: anthony.simmons@tmaa.asn.au​



Dylan Barker

TMAA Treasurer and SA Board Member

Dylan first started his journey into the traffic control industry in 2015, working as a Traffic Controller out on the road network. Here he gained valuable knowledge and skills on what to expect in the industry. Dylan then transitioned to Traffic Planner, working on multiple projects and major events in South Australia. In 2018, Dylan moved to Victoria and became a Major Projects and Planning Manager, managing traffic management on a large scale. Dylan is now back in South Australia and is Operations Manager for Traffic Group Australia.

Dylan Barker is TMAA's Treasurer and our SA Board Member.

Email: dylan.barker@tmaa.asn.au


Tynan Diaz

TMAA Secretary and NSW Board Member

Tynan Diaz is a highly accomplished professional in the traffic management industry. With over a decade's worth of experience, Tynan is an operational executive who is deeply passionate about road worker safety, operational excellence, and driving positive change through innovation.

Since assuming the role of TMAA NSW Division Chair in 2021, Tynan has played a vital role in advancing the association's goals and objectives. Tynan's efforts are focused on continuously raising the professionalism of the industry while prioritising safer outcomes for all road works and road users.

Tynan is TMAA's Secretary, our NSW Board Member and the Vice Chair of our NSW State Division.

Email: tynan.diaz@tmaa.asn.au



Peter Dixon

TMAA TAS Board Member

TMAA TAS Chair Peter Dixon has over 12 years’ experience in road safety from both holding leadership roles in organising special events, and professionally, working with Spectran Traffic. Peter enjoys working with local governments and stakeholders to develop safe solutions and consistency across work sites.

He has a dedication to the safety of the traffic controllers on his sites and the greater public. He is excited by the opportunities opened up by the formal adoption of the harmonised guide to temporary traffic management in Tasmania at the beginning January 2021.

Peter is the TMAA TAS Board representative.

Email: peter.dixon@tmaa.asn.au


Britt O'Dwyer

TMAA WA Board Member

With over 15 years of leadership experience in the Traffic Management industry, Britt brings a wealth of safety, operational and IR knowledge to the Board. Britt was appointed as the Chief Operating Officer of WARP Traffic Management in 2023.

Britt's foremost priorities revolve around spotlighting our industry and its pivotal role in delivering safety services.  She regularly advocates for traffic management personnel to be acknowledged as the safety professionals they truly are, raising awareness among both road workers and users about the importance of their presence.

Britt is the TMAA WA Board representative.

Email: britt.odwyer@tmaa.asn.au


Chris Boyer

TMAA NT Board Member

Chris Boyer has an industry history of nearly 15 years. He is currently in his second term as TMAA NT Chair. Chris was a founding member of the TMAA NT. While running his family business, TrafficWerx NT, Chris has served also served two terms as TMAA National Secretary and NT board delegate.

His passion is safety for Traffic controllers, road workers and motorists and ensuring everyone makes it home safely. ‘’My goal this term will be to lift the professionalism of the industry through new members, an accreditation scheme, and ensure our current close relationship with our road authorities continues to grow.’’

Email: chris.boyer@tmaa.asn.au


Our People


Matthew Bereni

Chief Executive Officer

Matthew has extensive industry and leadership experience in the public and private sectors in civil and transport engineering. Prior to joining TMAA, Matthew held the role of National Director of Strategy & Innovation with the Australian Road Research Board (ARRB). Matthew’s previous roles included Manager of National Harmonisation at the National Heavy Vehicle Regulator (NHVR) and Manager of Pricing and Economics at the National Transport Commission (NTC). Matthew is a graduate of the Australian Institute of Company Directors and has Honours Masters degrees from ‘École des Ponts ParisTech’ and ‘Ecole Nationale des Travaux Publics de l’Etat’, France and from Imperial College London.

Ph: 0417 553 433
Email: matthew.bereni@tmaa.asn.au


Bailey Morgan

Executive Assistant | National Secretariat

Bailey joined TMAA as National Secretary in 2023. Based in Melbourne, Bailey brings a wealth of expertise garnered over a decade of experience in delivering corporate advisory services across various industries, including Finance, Marketing, and Communications.

Bailey's role holds great significance as she takes on the responsibility of orchestrating our State meetings, ensuring seamless coordination, and providing invaluable support to our State divisions. Her extensive knowledge and proficiency enables effective collaboration and streamlined operations within our association.

Ph: 0466 017 202
Email: bailey.morgan@tmaa.asn.au


Belinda Dyer

National Accounts Officer

Belinda joined the TMAA team in 2024 as our National Accounts Officer. With over 10 years of experience as a qualified Bookkeeper and BAS Agent, Belinda brings a wealth of accounting and finance knowledge to her role. She has held corporate positions at organisations like PricewaterhouseCoopers, where she gained experience in events, marketing, human resources, and office management.

Most recently, Belinda served as the Executive Officer and Member Support lead for the Australia Indonesia Business Council. At TMAA, she oversees all aspects of accounting and finance operations. Her well-rounded background and expertise inform her work to support the association's growth and success.

Ph: 0493 534 282
Email: accounts@tmaa.asn.au

Thomas Morrissy

Advocacy and Policy Strategist

Thomas joined the TMAA in 2024 as Advocacy and Policy Strategist, bringing expertise and experience from government and consulting. Most recently, Thomas supported government relations activities on behalf of a range of clients across various industry sectors.

Thomas has experience working for a Federal Member of Parliament and Assistant Minister. In this role, he was responsible for research and stakeholder engagement, which involved extensive understanding and effective communication of government policy and was responsible as the primary intermediary between constituents and various government agencies.

Thomas has also worked on two Federal Election campaigns and brings in-depth advocacy experience to advocate on the association’s behalf.

Ph: 0436 109 349
Email: thomas.morrissy@tmaa.asn.au


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