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
Committed to a “Zero Harm” culture, prioritising the safety of personnel in all operations. Our management systems provide governance and compliance for our employees and subcontractors, ensuring everyone goes home safely every day.
Innovation and Efficiency
Committed to pioneering cutting-edge signalling solutions that set new benchmarks in the industry. By leveraging the latest technologies and streamlined management practices, we ensure our projects are delivered with unmatched efficiency, on time and within budget. Our proactive approach allows us to swiftly adapt to client needs and evolving project requirements, positioning us as leaders in innovation and operational excellence.
Expertise and Quality
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.
Collaboration and Teamwork
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.
Growth and Development
At ASI, we are dedicated to fostering both personal and organisational growth. We invest heavily in the professional development of our team, providing continuous learning opportunities and career advancement. Our commitment to growth extends to our company as well, as we constantly refine our processes and embrace new technologies to stay at the forefront of the industry. By prioritising the development of our people and our operations, we ensure sustained success and innovation in all our projects.
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.
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
Our team is comprimised of 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 ahead of the latest industry standards and technologies. This commitment enables us to deliver innovative and reliable solutions, positioning ASI as a leader in the rail signalling industry.
Client-Focused Solutions
We strive to exceed client expectations proactively and collaboratively. Understanding and meeting our clients’ specific needs, to 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 this continuous engagement and collaboration, we build strong client relationships, ensuring 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 team
Executive Team

Alistair Gilbert
General Manager

Brian Shellock
Operations Manager

Shaun Boyle
Commercial Manager
Steve Molloy
Project Manager

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 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 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

Stew Keir
Project Engineer
Gary Buckridge
Signals Team Leader









