Astralas Acquired by Bastion Security Group — Technology M&A

Bastion Security Group, a private equity-backed cybersecurity roll-up, has acquired Astralas in an add-on transaction. Astralas is a Melbourne-based provider of cybersecurity architecture and engineering services. The deal is reported at about $40 million, with the overall transaction value described in the $25 million to $50 million range. With the acquisition, Bastion’s headcount is expected to rise to roughly 250.

The move reinforces Bastion’s strategy of building a scaled services platform across enterprise security, particularly in Australia. Astralas’ engineering-led capabilities add to Bastion’s broader “mini-CyberCX” positioning, aimed at delivering advisory and implementation services to customers that need security design, deployment and ongoing support. The acquisition also follows Bastion’s earlier consolidation activity, including the purchase of Melbourne-based cybersecurity business Cythera.

Details on closing timing and transaction advisors were not provided. The announcement underscores continued private equity interest in cybersecurity services in Australia, as roll-ups seek to expand delivery capacity and deepen technical expertise through successive acquisitions.