About Us

Australian Signal Infrastructure Pty Ltd (ASI), established in 2015, specialises in providing high-quality and reliable signalling construction, testing, and commissioning. ASI has built a strong foundation of expertise by engaging leaders in the signalling field and maintaining a robust consortium of highly experienced subcontractors. This combination allows ASI to offer full turnkey signalling solutions that meet or exceed industry and client expectations. 

Our Approach

ASI is committed to delivering signalling solutions that are safe, dependable and tailored to the needs of each client and project. The company takes a proactive, solutions-focused approach, backed by streamlined management systems, technical expertise and a strong culture of collaboration.


Safety is central to every ASI operation. With a strong Zero Harm commitment and ISO 45001 accreditation, ASI prioritises the wellbeing of its workforce, subcontractors, stakeholders and the wider community. This is supported by robust governance systems that promote compliance, accountability and continuous improvement. 


Quality you can trust

OUR COMMITMENT

Signalling Experts 

Our team comprises highly skilled and experienced rail and signalling experts who are dedicated to maintaining the highest standards in all aspects of our work. Through ongoing training and professional development, we ensure that our staff stay abreast of the latest industry standards and technologies. This commitment to expertise enables us to deliver innovative and reliable solutions, positioning ASI as a leader in the rail signalling industry. 


Client-Focused Solutions 

We always strive to exceed our clients’ expectations with a proactive and collaborative approach. By prioritising the understanding and meeting of our clients’ specific needs, we ensure that our solutions are tailored to deliver maximum value. Our quality management system is designed to guarantee high-quality installations and services that comply with all national and client standards and specifications. Through continuous engagement and collaboration, we build strong relationships with our clients, ensuring their complete satisfaction. 


Comprehensive Quality Assurance Processes 

From the initial design phase through to project completion, our quality assurance processes are integrated into every step of our operations. This includes rigorous testing and commissioning protocols to ensure the reliability and safety of all installed systems. 


 ISO 9001 Accreditation 

Our ISO 9001 certification demonstrates our commitment to quality management principles, including a strong customer focus, the motivation and implication of top management, the process approach, and continual improvement. This accreditation ensures that our processes and services consistently meet customer and regulatory requirements. 


Continuous Improvement 

ASI is committed to the principle of continuous improvement. We regularly review and refine our processes, incorporating feedback and lessons learned from each project to enhance our performance and deliver even greater value to our clients. 


Collaborative Partnerships 

We view our subcontractors as integral partners, fostering close relationships that enhance our operations and contribute to better project outcomes. By ensuring that our subcontractors adhere to our stringent quality standards, we guarantee the reliability and excellence of all materials and services used in our projects. This collaborative approach helps us to deliver superior results, benefiting all stakeholders involved. 


Our Values

ASI’s core values ensure a seamless integration and shared commitment to excellence.

Safety and Wellbeing

Innovation and Efficiency

Expertise and Quality

Collaboration and Teamwork

Growth and Development

Occupational
Work Health and Safety 

ASI is ISO 45001 accredited, committed to best practice WHS strategies to improve performance on site continuously. Our Zero Harm commitment ensures the safety of our workforce, stakeholders, and the community. 

Legislation Compliance 

ASI complies with relevant legislation, including Acts, Regulations, Australian Standards, and codes of practice, ensuring all projects meet legal and safety requirements. 

OUR COMMITMENT
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Key Aspects of Our Quality Commitment

At ASI, we understand that quality is paramount in the rail signalling industry. Our unwavering commitment to quality ensures that we remain a trusted partner for our clients, delivering projects that are safe, reliable, and of the highest standard.

Signalling Experts

Client-Focused Solutions

Comprehensive Quality Assurance Processes

ISO 9001 Accreditation

Continuous Improvement

Collaborative Partnerships

Our team

Executive Team

Alistair Gilbert
General Manager

Brian Shellock
Operations Manager

Shaun Boyle
Commercial Manager

Brian Shellock
Operations Manager

ABOUT BRIAN

Steve Molloy
Project Manager

Alistair Gilbert
Alistair Gilbert
General Manager
More about Alistair
Alistair Gilbert

Alistair Gilbert is the General Manager of Australian Signalling Infrastructure (ASI), bringing 26 years of senior leadership experience in the rail industry as both a manager and successful business owner.


He has delivered complex rail and infrastructure projects across Australia, Mauritania, Hong Kong, and South Africa, and has extensive experience as a supplier of rail and mining products to major clients. Alistair’s broad international and domestic background gives him a unique ability to drive business growth, operational performance, and strong client relationships with Tier 1 contractors and rail operators.


Under his leadership, ASI continues to expand its capability and reputation for delivering high-quality signalling solutions across Australia.

Brian Shellock
Brian Shellock
Operations Manager
More about Brian
Brian Shellock

Brian Shellock is a highly experienced signalling leader and Operations Manager at ASI, with over 20 years delivering complex rail signalling and infrastructure projects across Australia and the UK.


He holds an Advanced Diploma of Engineering (due 2026), a Cert IV in Project Management, and an extensive range of specialist signalling accreditations including IRSE Licence, MTM Senior Signal Construction and Test Engineer (SME), MICROLOK II, Westrace MKII, Frauscher Axle Counters, and ETCS systems.

Brian has held key signalling construction roles with Tier 1 contractors and clients including Siemens, Martinus, Rail Control Systems Australia, and Aurizon. His major project delivery includes:

  • Cross River Rail (Brisbane) – Signalling Construction Lead for Rail Integration and Systems
  • ETCS Level 2 Trainguard – Aurizon (first implementation in Australia)
  • Wulkuraka Connection Works & Maintenance Facility – Queensland Rail
  • Regional Rail Link – Victoria (major signalling testing and commissioning)

Brian brings strong technical expertise across relay, solid state, and microprocessor interlocking systems, combined with proven leadership in brownfield and greenfield environments. He is particularly recognised for mentoring teams, managing complex interfaces, and delivering high-quality signalling outcomes in live operational rail settings.

Alistair Gilbert
Alistair Gilbert
General Manager
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Alistair Gilbert

Alistair Gilbert is the General Manager of Australian Signalling Infrastructure (ASI), bringing 26 years of senior leadership experience in the rail industry as both a manager and successful business owner.


He has delivered complex rail and infrastructure projects across Australia, Mauritania, Hong Kong, and South Africa, and has extensive experience as a supplier of rail and mining products to major clients. Alistair’s broad international and domestic background gives him a unique ability to drive business growth, operational performance, and strong client relationships with Tier 1 contractors and rail operators.


Under his leadership, ASI continues to expand its capability and reputation for delivering high-quality signalling solutions across Australia.

Staff Team

Gary Docherty
Head of Construction

Tracey O’Donnell
Compliance Officer

Shannon Holman
Site Supervisor

Shannon Holman
Site Supervisor

Stew Keir
Project Engineer

Gary Buckridge
Signals Team Leader