Network Security Lead, Sr Manager in London

Accenture is looking for an exceptional Network Security Lead to join our Network Infrastructure Engineering practice. This is a senior individual‑contributor and client‑leadership role for someone who combines deep enterprise network security expertise with the commercial instinct and communication skills to win trust at the highest levels of a client organisation. You will be the go‑to security authority within the network practice – the person clients call when they need to understand how to modernise their security architecture, navigate a compliance challenge, or respond to an evolving threat landscape. You will own relationships with a portfolio of blue‑chip enterprise clients, guiding them on their journey toward Zero Trust, SASE, and SSE adoption, while shaping and delivering the work that follows.

This role demands someone who is equally comfortable whiteboarding a ZTNA architecture with a room full of CCIEs, presenting a business case to a CISO, and rolling up their sleeves to produce the proposal, design, or deliverable that gets the deal done. Versatility is not optional – it is the role.

• Client Relationship & Advisory
  • Own and develop trusted senior relationships across a portfolio of blue‑chip enterprise clients, acting as their primary network security advisor within Accenture.
  • Advise clients at CISO, CTO, and VP Infrastructure level on network security strategy, architecture modernisation, and risk posture improvement.
  • Lead client workshops, discovery sessions, and executive briefings, facilitating complex technical and strategic conversations with confidence and clarity.
  • Serve as a trusted thought partner as clients navigate regulatory compliance requirements, security frameworks (e.g. NIST, ISO 27001, NIS2, DORA), and evolving threat environments.
  • Identify and shape new opportunities within existing accounts, recognising client challenges and translating them into well‑formed propositions.
• Technical Leadership
  • Provide authoritative guidance on enterprise network security architecture, with particular depth across: SASE (Secure Access Service Edge), SSE (Security Service Edge), ZTNA / Zero Trust, Next‑Generation Firewall & IPS/IDS, Network Access Control, Secure SD‑WAN, Cloud Security Networking, PKI, certificate management, and encryption standards at scale.
  • Stay ahead of the vendor landscape, providing clients with impartial, outcome‑driven guidance.
  • Act as a technical escalation point for the wider network engineering team on security‑related matters.
  • Contribute to internal capability development, helping upskill the team on emerging security technologies and methodologies.
• Proposals, Pursuits & Deliverables
  • Lead the development of security proposals, RFP responses, and solution designs, from initial shaping through to final submission and presentation.
  • Create high‑quality client‑facing deliverables – architecture documents, current‑state assessments, roadmaps, business cases, and executive presentations.
  • Collaborate with sales and account teams to shape win strategies, define differentiated propositions, and structure commercial approaches that resonate with technical and business buyers alike.
  • Be willing and able to personally produce deliverables where required.
• AI Proficiency & Innovation
  • Leverage AI tools and platforms to accelerate the production of proposals, assessments, research, and client communications.
  • Advise clients on the security implications of AI adoption within their environments.
  • Critically evaluate AI‑generated outputs, understanding where AI adds velocity and where human judgement and expertise remain essential.
  • Champion the pragmatic use of AI within the network practice to improve team productivity and the quality of deliverables.

• Technical
  • Extensive hands‑on and advisory experience across enterprise network security, with demonstrable depth in SASE, SSE, Zero Trust, and secure networking architectures.
  • Strong understanding of enterprise networking fundamentals.
  • Experience designing or advising on large‑scale security transformation programmes.
  • Familiarity with compliance and regulatory frameworks relevant to enterprise clients.
  • Working knowledge of at least two or more leading security vendors at an architectural level.
• Commercial & Communication
  • Proven ability to write and present high‑quality proposals and technical documents to senior client audiences.
  • Track record of owning client relationships in a consulting, vendor, or managed services context.
  • Ability to command technically complex rooms.
  • Commercially aware, with an understanding of how to frame security investments.
  • Adaptable communication style.
• AI & Tools
  • Actively proficient with AI‑assisted tools for content creation, research, and analysis.
  • Clear‑eyed understanding of the limitations and risks of AI‑generated output.

• Degree in Computer Science, Information Security, Engineering, or equivalent practical experience.
• One or more of the following certifications highly desirable: CISSP, CISM, or CCSP, CCIE Security Vendor certifications.
• Familiarity with SABSA, TOGAF, or equivalent security/enterprise architecture frameworks advantageous.

The Ideal Candidate: You are not a pure architect who hands off to others, nor a pure account manager who relies on technical colleagues to fill the gaps. You occupy a rare middle ground – someone who has earned their stripes technically and subsequently developed the judgement, communication skills, and commercial instincts to lead at a strategic level. You are energised by variety. You do not just direct – you do. You understand that AI is a tool, not a replacement for expertise, and you use it intelligently to move faster and produce better work – without compromising quality or accuracy. Most importantly, you genuinely care about helping clients improve their security posture, meet their compliance obligations, and protect what matters most to their business.

What You Will Own:

• Portfolio of blue‑chip enterprise accounts – Client Relationships
• SASE, SSE, ZTNA, Zero Trust strategy and architecture – Security Advisory
• End‑to‑end security bid leadership and content creation – Proposals & Pursuits
• Network security escalation point for the practice – Technical Authority
• Practical AI adoption within the team and client advisory – AI Enablement
• Regulatory alignment across client security programmes – Compliance Guidance

Equal Employment Opportunity Statement: Accenture is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All employment decisions shall be made without regard to age, race, creed, color, religion, sex, national origin, ancestry, disability status, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, citizenship status or any other basis as protected by federal, state, or local law.

Locations: London