John Bruce

Quorum Cyber, a Microsoft-focused cybersecurity firm, added John Bruce as Chief Information Security Officer among a group of senior executive hires. The addition was reported the week of November 24, 2025, as part of the company's executive team expansion.

According to the company, Bruce is responsible for developing and implementing the internal security strategy of Quorum Cyber and for managing its own risk profile. The company says he will work with the executive team so that security initiatives are aligned with its growth plans and business objectives. According to the company, he will also counsel customer organisations as they deal with complex security challenges and make decisions about their security programmes.

The company says Bruce has more than 25 years of cyber security experience and has held CISO and senior security leadership positions at financial institutions and technology companies. According to the company, his background includes advising boards on cyber security strategy, managing global security operations and building security programmes. Bruce writes that his earlier senior leadership roles were at Royal Bank of Scotland, Lloyds Banking Group and IBM. Bruce writes that this year he decided to move from being a customer to being CISO, joining the team that had protected his organisation.

The company ties the appointment to its continued global expansion of services and to strengthening its internal security posture. Quorum Cyber says it has grown its customer base and its workforce in recent years.

According to Bruce, the company made two acquisitions in 2024 and its services now range from ransom negotiation and incident response to managed services and phishing simulation. Bruce writes that his work at Quorum Cyber helps to safeguard hundreds of not-for-profit, private and public organisations across the UK.