(INV) Senior Consultant, Cybersecurity, OT Technical Consultant TC, UKI

EY; Greater London; Sur place; GBP 90 000 - 130 000; Plein temps

Avantages offerts par ce poste

Flexible working

Health & wellbeing benefits

Insurance

Savings and discounts

Résumé du poste

EY in London is seeking a Senior Consultant in Cybersecurity focusing on OT/IT security architecture and engineering outcomes for clients across sites and regions. You will work within delivery teams to design secure solutions and provide technical input across engagements, while developing artefacts and contributing to EY’s Cyber Engineering capability.

The role requires OT exposure, willingness to travel, and certifications; EY offers a flexible, inclusive culture with career development and a

Qualifications

• Demonstrable cybersecurity experience with OT on-site work.

Responsabilités

• Deliver cybersecurity engineering engagements across IT/OT.
• Implement security measures per blueprints: firewalls, segmentation, VLANs.
• Produce engineering artefacts and baselines.
• Support secure remote/local access implementations.
• Lead client workshops and design reviews.
• Share knowledge and develop capabilities within Cyber Engineering.

Connaissances

Communication skills

Proactive learner

Team player

Fast-paced environment

Formation

CCNA/CCNP or equivalent

NIST/ISO 27001 knowledge

Outils

Cisco

Fortinet

Palo Alto

Description du poste

(INV) Senior Consultant, Cybersecurity, OT Technical Consultant TC, UKI

Location: London

Other locations: Primary Location Only

Date: 15 Oct 2026

Requisition ID: 1750928

At EY, we’re all in to shape your future with confidence.

We’ll help you succeed in a globally connected powerhouse of diverse teams and take your career wherever you want it to go.

Join EY and help to build a better working world.

Cybersecurity & OT Technical Consultant – Senior Consultant:

About EY:

At EY, we are committed to building a better working world. Our Cybersecurity Consulting Practice is rapidly expanding, and we are investing in our capabilities to meet the increasing demand for cybersecurity solutions. Join us and be part of a global team of over 13,000 professionals dedicated to delivering cutting-edge security transformation programs and services.

The Opportunity:

As a Senior Consultant in Cybersecurity, you will contribute to the delivery of high-quality security architecture and engineering outcomes for our clients. You will work as part of delivery teams, supporting the design and documentation of secure solutions and providing technical input across a range of cybersecurity engagements.

Key Responsibilities

• Support delivery of complex cybersecurity engineering engagements across multiple sites and regions encompassing IT and OT with alignment to EY’s standards and client expectations.
• Implement security measures from blueprints, including firewall configurations, network segmentation (zones and conduits), VLANs, ACLs, and secure site to cloud connectivity.
• Produce engineering artefacts such as build standards, configuration baselines, and as-built documentation.
• Assist with secure remote and local access implementations (e.g., PAM, jump hosts, PAW)
• Support client workshops, design reviews and technical discussions.
• Contribute to internal knowledge sharing, reusable assets and capability development within the Cyber Engineering team.

Skills and Attributes for Success:

• Ability to work and thrive in a fast-paced, result driven environments.
• Communication skills, both oral and written, tailored to diverse audiences.
• A proactive learner with a strong interest in developing deeper security architecture expertise.
• Strong team player who values collaboration and encourages open communication among team members.

To Qualify for the Role, You Must Have:

• Demonstrable experience in cybersecurity with on‑site experience (OT experience desirable but not mandatory).
• Network engineering skills (routing, switching, VLANs, ACLs, NAT), firewall rule‑base, and network segmentation.
• Some experience implementing secure remote and local access and privileged access e.g. PAM, jump hosts, PAW.
• Working knowledge of any cybersecurity framework or standard such as NIST or ISO 27001.
• Willingness to travel for client delivery (domestic and international as required).

Ideally, You’ll Also Have

• Experience with any major security vendors (e.g. Cisco, Fortinet, Palo Alto).
• OT exposure such as SCADA/PLC/HMI basics, OT protocols
• Experience coordinating with operations on infrastructure changes such as IP re‑addressing and re‑cabling
• Certifications such as CCNA/CCNP or equivalent.
• Ability to obtain and maintain UK Government security clearances

Join Us:

At EY, you’ll have the chance to build a meaningful and fulfilling career, supported by an inclusive culture and cutting-edge technology. Together, we can create a better working world for all.

What we look for

We’re interested in people with integrity who can collaborate with people from a diverse range of backgrounds and crucially a growth mindset.

What we offer

We offer a competitive remuneration package where you’ll be rewarded for your individual and team performance. Our comprehensive Total Rewards package includes support for flexible working and career development, and with FlexEY you can select benefits that suit your needs, covering holidays, health and well-being, insurance, savings and a wide range of discounts, offers and promotions. Plus, we offer:

• Continuous learning:You’ll develop the mindset and skills to navigate whatever comes next.
• Success as defined by you: We’ll provide the tools and flexibility, so you can make a meaningful impact, your way.
• Transformative leadership: We’ll give you the insights, coaching and confidence to be the leader the world needs.
• Diverse and inclusive culture: You’ll be embraced for who you are and empowered to use your voice to help others find theirs.

EY | Building a better working world

EY is building a better working world by creating new value for clients, people, society and the planet, while building trust in capital markets.

Enabled by data, AI and advanced technology, EY teams help clients shape the future with confidence and develop answers for the most pressing issues of today and tomorrow.

EY teams work across a full spectrum of services in assurance, consulting, tax, strategy and transactions. Fueled by sector insights, a globally connected, multi-disciplinary network and diverse ecosystem partners, EY teams can provide services in more than 150 countries and territories.

EY refers to the global organization, and may refer to one or more, of the member firms of Ernst & Young Global Limited, each of which is a separate legal entity. Ernst & Young Global Limited, a UK company limited by guarantee, does not provide services to clients.