Leadership Team

Our leadership team collectively draws on decades of experience in rail and transport to drive efficiency and innovation across the company.

Management Team

Joanne Wust

Chief Executive Officer, 4Tel Group

Tony Crosby

Chief Executive Officer, 4Tel

Mark Wood

General Manager of Communications & Electronics

Graham Hjort

General Manager of Control Systems

James Woltjer

General Manager of Software

Team Leaders

Matt Burger

Systems Integration Team Leader

Jill Weaver

Project Team Leader

Andrew Horrocks

Testing Team Leader

Nic Nancarrow

Systems Support Team Leader

Jeff King

Shift Tech Team Leader

Rodney Lewis

Senior Software Engineer

Joanne Wust

Chief Executive Officer, 4Tel Group

Following many years in a marketing development role at 4Tel, Joanne’s role as group CEO encompasses driving an innovation agenda across all of the company’s business units.  This involves pursuing advancements in Artificial Intelligence, Machine Learning and other future-thinking technologies that can help solve industry problems.

Passionate about furthering 4Tel’s presence locally and internationally, Joanne brings expertise in corporate communications, international relations and marketing from her previous government, entertainment and technology positions.

Tony Crosby

Chief Executive Officer, 4Tel

Tony Crosby is 4Tel’s Chief Executive Officer. He joined 4Tel in 2013 as General Manager of Services, where he was responsible for the company’s customer support contracts and ongoing local and international business development, before taking up his current role as CEO of 4Tel in 2023.

Tony has extensive industry experience, having worked within the rail industry since 2000. His roles have included Systems Asset Manager for the Rail Access Corporation where he delivered capital projects to replace signal control panels with the ATRICS computer-based signal control system, and as ARTC’s National Train Communications System (NTCS) Project Manager for the design and delivery of the ICE radio.

Tony is formally recognised by Engineers Australia as a Chartered Professional Engineer, and holds a Bachelor of Engineering, Communications-Electronics with Honours, and an MBA in Technology.

Mark Wood

General Manager of Communications & Electronics

Mark is the General Manager of Communications and Electronics at 4Tel.  Mark has been with 4Tel since 2004 and is responsible for the delivery of major projects, customer management, and managing subdivisional teams.

Mark has been the key project delivery manager most recently for Transdev Sydney Ferries, TATA Chemicals Magadi Ltd, Newcastle Light Rail, and Transport for NSW Port Botany OPMS, to name a few.  During his tenure, he has also been a critical component to the successful delivery to the NSW Country Regional Network (CRN), as well as the Research and Development activities of the company.

Prior to 4Tel, Mark spent 13 years in the Royal Australian Airforce as a Communication Electronics System Technician. 

Mark has an Advanced Diploma of Electrical Engineering with Distinction, and an Advanced Diploma of Communications Management.

Mark is also the Chief Technology Officer for 4AI Systems, a subsidiary company of the 4Tel Group Pty Ltd.

Graham Hjort

General Manager of Control Systems

Graham Hjort is 4Tel’s General Manager of Control Systems. With over 25 years of signalling and train control system experience, Graham brings with him a wealth of industry knowledge to control system solutions. 

Graham has reliably delivered numerous large projects, most notably the creation of a new Country Regional Network (CRN) train control centre for the Country Regional Network (CRN), to enable separation of train control from ARTC.  The new facility was established within 12 months and continues to provide industry leading reliability for regional train control.  As a supporter of new technology, Graham has overseen the transformation of regional train control in New South Wales with notable advancements such as  the introduction of Electronic Train Authorities, Out of Authority alarm delivery to locomotives, Proximity Reminders, and digital work-on-track initiatives such as PTW and PTW-V (ETW, ETW-V, eTAP, eTAP-V). 

Following many years of successful operation on the CRN, Graham is now leading the expansion of these safety and efficiency initiatives across parts of the ARTC network. 

Graham holds a Bachelor of Engineering with Honours and a Graduate Diploma in Railway Signalling.

James Woltjer

General Manager of Software

James is the General Manager of Software at 4Tel.  James has been with 4Tel since 2015 and is responsible for the planning, design, delivery and management of software produced by the 4Tel Team.

During his tenure at 4Tel, James rewrote 4Trak into the current HTML5 format and is a leader in the Research and Development of new products, most recently for 4AMS, 4Port, and 4LRMS.  James understands the complex nature of software development and has a deep appreciation for the importance of collaboration, communication and teamwork in delivering high-quality products. He is dedicated to ensuring the team not only meets, but exceeds client expectations.  He is passionate about exploring new technologies, refining processes and creating opportunities for continued improvement. 

James’ background spans several industries including Education, Finance and Mining. James has trade qualifications in Communications and Electronics.