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Deloitte

Senior Manager/Manager, Cyber Security Manager, Cyber, Defence & Security (Government and Public Sector)

Hybrid

London, United kingdom

Senior

Freelance

12-02-2026

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Skills

Leadership Incident Response Architecture Security Architecture Risk Analysis

Job Specifications

Connect to your Industry

Do you want to be at the heart of some of the biggest and most ambitious programmes undertaken to keep our country safe?

We are proud of the impact we have with our range of Defence and Security clients, from the strength of our relationships to the variety of our skills and expertise that we bring to help these clients deliver on their mission.

We’re growing our teams across all of Technology and Transformation. If you are cleared to SC or DV level, or willing and eligible to obtain this and want to grow your career in this sector, we would love to hear from you.

Connect to your career at Deloitte

Deloitte drives progress. Using our vast range of expertise, we help our clients' become leaders wherever they choose to compete. To do this, we invest in outstanding people. We build teams of future thinkers, with diverse talents and backgrounds, and empower them all to reach for and achieve more.

What brings us all together at Deloitte? It’s how we approach the thousands of decisions we make every day. How we behave, our beliefs and our attitudes. In other words: our values. Whatever we do, wherever we are in the world, we lead the way, serve with integrity, take care of each other, foster inclusion, and collaborate for measurable impact. These five shared values lead every decision we make and action we take, guiding us to deliver impact how and where it matters most.

Connect to your opportunity

We recognise the importance of bringing together diverse experience and perspectives to innovatively solve some of our clients most complex problems and as a Cyber Security Manager, you will become a trusted advisor to those clients, helping them to navigate the complex world of cyber security, building robust security postures and supporting complex cyber transformations. You will leverage your expertise and that of our technical SMEs to assess their current state, identify vulnerabilities and design and implement tailored solutions that align with their business objectives and risk appetite.

As a senior member of the team, you must develop relationships with key stakeholders, understand a client’s security policy framework and control sets, and design solutions that will meet our unique requirements.

Our projects vary greatly and your responsibility as a cyber security manager will differ based on the focus of the engagement and your skillset, but could include and may require you to:

Lead client engagements, building strong relationships and understanding their business objectives, risk tolerance, and security challenges.
Conduct effective workshops and presentations, clearly communicating complex security concepts to both technical and non-technical stakeholders.
Perform comprehensive cyber security assessments, including: vulnerability assessments; security architecture reviews; and risk analysis to identify potential security threats and vulnerabilities.
Utilise industry-standard frameworks and methodologies (e.g., NIST, ISO 27001, CIS, CAF) to evaluate and benchmark client security posture.
Develop pragmatic and cost-effective security solutions tailored to client needs, encompassing people, process, and technology aspects.
Provide guidance on security technologies, architectures, and best practices for implementing secure solutions.
Assist clients in developing and refining their cyber security strategy, aligning it with their business goals and risk appetite.
Create actionable roadmaps for implementing security initiatives, prioritising activities based on risk and business impact.
Support clients in developing and testing incident response plans and business continuity strategies.
Stay abreast of emerging threats, vulnerabilities, security trends and industry best practices.
Contribute to thought leadership initiatives, developing white papers, presentations, and blog posts to share expertise.
Provide specialist technical advice, recommended approaches, recommended security controls and identify solutions that meet client business objectives.
Stay up to date with emerging security threats, technologies, and industry best practices, and provide recommendations for improvement.

Connect to your skills and professional experience

All applicants must be willing and eligible to apply for and obtain UK security clearance to Security Check (SC) or Developed Vetting (DV) level, if not already holding an existing clearance.

Candidates will be able demonstrate relevant knowledge and experience through a combination of qualifications and evidence of work history such as:

Information Security qualification (or equivalent) e.g. CISSP, CISM, CRISC, GSEC.
In-depth knowledge of security frameworks, standards, and best practices (e.g., ISO 27001, NIST, CIS, CAF).
Experience of working in Cyber/Information security within the Defence / Security environment with a focus on one of more of the domains (Land, Air, Maritime, Space, Cyberspace).
Experience of working within Defensive Cyber Oper

About the Company

Deloitte drives progress. Our firms around the world help clients become leaders wherever they choose to compete. Deloitte invests in outstanding people of diverse talents and backgrounds and empowers them to achieve more than they could elsewhere. Our work combines advice with action and integrity. We believe that when our clients and society are stronger, so are we. Deloitte refers to one or more of Deloitte Touche Tohmatsu Limited (“DTTL”), its global network of member firms, and their related entities. DTTL (also refer... Know more