Castlerock Property is a fund manager and developer, specialising in government-tenanted properties. With strong regional roots, the team is building towards leadership in high-quality commercial tenancies beyond the nation’s CBDs.
They’re on the ground and hands-on. From developing and managing buildings to leasing and finance, Castlerock delivers every service in-house to maintain quality and consistency. Today, that takes a team of 46 people, distributed between their Melbourne head office, a major construction project in Townsville, plus a dedicated facilities manager in Brisbane.
People-focused and quality-committed
Castlerock Property is a business founded on strong partnerships, both with their tenants and the wholesale and retail investors that participate in their funds.
Group Financial Controller, Mark Shanks says, “We understand how to provide the right buildings for the right tenants and have created lasting relationships with State and Federal Governments.”
Castlerock knows the quality of their buildings is paramount to happy stakeholders. That quality commitment has fueled their strong track record for stability and returns that their investor community values.
Tech-enabled growth
For Castlerock, technology is a key enabler for business efficiency and growth.
“We see great IT as a powerful way to keep improving how we work, strengthen our security, and unlock new opportunities.”
Mark notes that reliable operations help the Castlerock team focus on delivering great stakeholder outcomes. That means reducing operational risk today, while making deliberate choices that support future growth. Currently, strengthening cybersecurity measures is a key focus, while also making a strategic move to cloud-based systems to improve scalability and resilience.
Looking ahead, Castlerock sees opportunities in smarter tools and AI to streamline workflows and improve efficiency.
Listening to level up
When Castlerock was looking for an IT partner, they wanted someone who would work alongside them, learn and align with their business priorities.
“From day one, Bigfish took the time to listen, understand what we needed, and deliver exactly that,” Mark shares.
“Bigfish stepped into our business two years ago, helped fix several problems we were having and the support since then has been outstanding.”
That foundation of trust continues today. Together, Bigfish and Castlerock have built an IT environment that supports reliable day-to-day operations, while removing barriers to what’s next.
Trusted Partners
At Bigfish Technology, we believe the right IT partner can take a business to the next level. We serve businesses like Castlerock Property to help activate their vision with clear advice and genuine commitment to their goals.
Ready to see what next-level IT could mean for your business? Let’s chat.

