Head of Security

As UK Head of Security, you will architect and lead the firm's physical and environmental security strategy across its UK footprint, safeguarding its people, assets, and reputational standing. You will serve as a trusted adviser to senior leadership, providing authoritative guidance on crisis response and shaping the organisation's strategic posture against evolving threats - encompassing insider risk, travel risk, and executive protection.

Through close collaboration with internal stakeholders, public authorities, and specialist suppliers, you will build and sustain a high-performing security function, driving consistent and rigorous standards across a complex, multi-site environment. This is an opportunity to shape security strategy at the most senior levels of the firm - defining its security posture, influencing critical decision-making, and make a lasting contribution to the safety, resilience, and protection of the firm's UK operations and its people.

About the role This role sits within Group Corporate Services, which provides the essential services and infrastructure that enable the firm's people and business to operate effectively. As the firm's authority on physical and environmental security, you will define and drive its long-term strategic direction across the UK estate, translating intelligence insights, legislative developments, and emerging risk landscapes into clearly articulated priorities and decisive, practical action.

You will exercise strategic leadership alongside hands-on operational oversight, assuming full ownership of the firm's security policy framework, budget governance, and supplier performance management. The role encompasses executive responsibility for the 24-hour Global Security Operations Centre, enterprise-wide travel risk management, and the delivery of executive protection programmes. You will serve as an on-call Crisis Management Co-ordinator, representing the firm at a senior level across a portfolio of strategic partnerships - including intelligence agencies, protective security bodies, counter-terrorism authorities, and law enforcement organisations - whilst fostering collaborative relationships with peer organisations across the professional services sector.

• Lead and deliver an enterprise-wide physical and environmental security strategy that proactively anticipates emerging threats, aligns with core business priorities, and fortifies organisational resilience across all UK locations.
• Provide authoritative, evidence-based counsel to senior leadership across the full spectrum of security disciplines - encompassing strategic security direction, executive protection, insider threat mitigation, investigations, crisis management, and significant incident response.
• Lead the firm's counter-terrorism planning capability and discharge responsibilities as a voting member of the Insider Threat Programme Steering Group, influencing policy and strategic decision-making at the highest level.
• Inspire, develop, and hold to account both internal and contracted security teams, establishing clear performance objectives and embedding a culture of professionalism, accountability, and continuous improvement.
• Own the Physical and Environmental Security Policy, ensuring sustained alignment with applicable UK legislation, regulatory expectations, and the physical security requirements of ISO 27001, ISO 31030, and BS 16000, whilst proactively anticipating evolving compliance obligations.
• Provide strategic oversight of the Global Security Operations Centre, Travel Risk Management and Executive Protection programmes, ensuring that proportionate, intelligence-led safeguards are in place for all colleagues travelling on firm business.
• Exercise…