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- Tasks: Lead the design and implementation of network security for critical OT environments.
- Company: Join Tata Consultancy Services, a global leader in IT services dedicated to meaningful transformation.
- Benefits: Enjoy competitive salaries, health perks, wellness initiatives, and extensive training resources.
- Why this job: Make a real impact on global operations while working with top brands and innovative projects.
- Qualifications: Experience in Network Security Architecture and strong stakeholder engagement skills are essential.
- Other info: TCS values diversity and is committed to accessibility for all applicants.
The predicted salary is between 54000 - 84000 £ per year.
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Talent Advisory Consultant @ Tata Consultancy Services | Human Resources
Are you looking to leverage your expertise in OT network security architecture?
We have a great opportunity for you – Lead Security Architect (OT) Network!
Careers at TCS: It means more
TCS is a purpose-led transformation company, built on belief. We do not just help businesses to transform through technology. We support them in making a meaningful difference to the people and communities they serve – our clients include some of the biggest brands in the UK and worldwide. For you, it means more to make an impact that matters, through challenging projects which demand ambitious innovation and thought leadership.
- Shape the security architecture of critical OT networks across global operations.
- Influence strategic decisions with senior stakeholders and cross-functional teams.
- Lead risk-based security design that protects real-world infrastructure.
The Role
As a Lead Security Architect (OT) Network, you will define and implement network security architecture strategy, working closely with the Networks team, IT, and business stakeholders. You will align with the client’s Security Architecture team to ensure global consistency and strategic direction. Reporting to the Group Head of Security Architecture, you will bring extensive experience in engaging senior stakeholders and operating within global teams. Your focus will include network architecture, threat assessment, risk analysis, and the implementation of controls to manage residual risk across both programme and project level.
Key responsibilities:
- Lead the creation and execution of the global OT network security architecture strategy, ensuring alignment with business goals and risk posture.
- Collaborate with Security Architects, Business Architects and other stakeholders to design secure OT network solutions that support Zero Trust and segmentation models.
- Define secure zoning architectures and security controls for critical OT environments, including guidance on protecting assets between network zones.
- Contribute to the development and governance of network-related security policies, patterns, and standards.
- Support integration of OT network security within broader enterprise security frameworks and architecture.
- Assess risk, perform threat modelling, and drive decisions around secure network design and segmentation.
- Work closely with Network team to embed security into network design, decommissioning, and operational models.
- Define and support reusable network security blueprints for secure-by-design implementation.
- Engage with Procurement to support security requirements in vendor solutions.
- Monitor developments in OT network security and propose updates to improve scalability, resilience, and security posture.
- Contribute to network-related audits, assessments, and compliance reviews.
- Provide expert input into infrastructure and application-level network security assessments.
- Support secure solution design through collaboration across IT, engineering, and operations.
Your Profile
Essential skills/knowledge/experience:
- Proven experience in Network Security Architecture (or similar role) in a large-scale, high-criticality environment.
- Strong understanding of Enterprise Network Architecture across OT and IT domains.
- Ability to engage and influence stakeholders at all levels, with experience working in matrixed organisations and global teams.
- Proven ability to define and deliver complex security architectures aligned with business, risk, and compliance requirements.
- Clear understanding of zoning, segmentation, and secure connectivity models.
- Familiarity with frameworks such as NIST, ISO27001, SABSA, TOGAF, and relevant UK/EU regulations.
- Strong communication and presentation skills, with the ability to translate technical content for diverse audiences.
- Comfortable working under pressure and managing competing priorities with minimal oversight.
- Experience in threat modelling, risk assessment, and security control design.
- Certifications such as CISSP, CCSP, CCNP/CCNA, TOGAF, OR SABSA.
- Experience in regulated industries such as critical infrastructure, energy, or manufacturing.
- Exposure to cloud and hybrid networking models (e.g., SD-WAN, remote access, VPNs).
- Understanding of Zero Trust principles and their application in OT environments.
- Familiarity with architecture governance and assurance processes.
- Knowledge of tools and platforms for network monitoring, asset discovery, and policy enforcement.
- Experience working with suppliers or vendors on security-critical solutions.
- Ability to drive architectural decisions through influence, with a strategic and delivery-focused mindset.
TCS is consistently voted a Top Employer in the UK and globally. Our competitive salary packages feature pension, health care, life assurance, laptop, phone, access to extensive training resources and discounts within the larger Tata network.
We offer health & wellness initiatives and sports events; we are the proud sponsor of the London Marathon.
Diversity, Inclusion and Wellbeing
Tata Consultancy Services UK&I is committed to meeting the accessibility needs of all individuals in accordance with the UK Equality Act 2010 and the UK Human Rights Act 1998.
We welcome and embrace diversity in race, nationality, ethnicity, disability, neurodiversity, gender identity, age, physical ability, gender reassignment, sexual orientation. We are a disability inclusive employer and encourage disabled people to apply for this role.
As a Disability Confident Employer, we offer an interview to applicants with disabilities or long-term conditions who meet the minimum criteria for the role. Please email us at UKI.recruitment@tcs.com if you would like to opt in.
If you are an applicant who needs any adjustments to the application process or interview, please contact us at UKI.recruitment@tcs.com with the subject line: “Adjustment Request” or call TCS London Office 02031552100 / +44 204 520 2575 to request an adjustment. We welcome requests prior to you completing the application and at any stage of the recruitment process.
Next Steps:
Application Process
- Online application: You can apply directly through LinkedIn/ by uploading your CV. In case you wish to submit your application via another format like audio/video, please, contact – UKI.recruitment@tcs.com
- Skill-Based discussion: This will be a level 1 interview with the project team, it can be via video or in-person. Details will be confirmed by your recruiter.
- Managerial discussion: This discussion will focus on behavioural aspects and person-organisation fit.
- HR Discussion: This will be with one of the members of the HR team and will cover your career journey, aspirations for growth, compensation and any other questions you may have.
Beware of Fraudulent offers
This is to notify you that TCS does not ask for any sort of payment or security deposit from candidates at any stage of the recruitment process. The firm never sends out job offers from free internet email services like Gmail, Yahoo Mail, and so on. TCS has not authorised any third-party company to collect money on their behalf. As a vigilant job seeker, beware of fraudulent recruitment activity and protect your interests! You can write to UKI.recruitment@tcs.com to report any fraudulent activity.
Due to the high volume of applications, we will be unable to contact each applicant individually on the status of their application. If you have not received a direct response within 30 days, then it should be deemed unsuccessful on this occasion.
Join us and do more of what matters. Apply online now.
Seniority level
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Seniority level
Mid-Senior level
Employment type
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Employment type
Full-time
Job function
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Job function
Information Technology
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Industries
IT Services and IT Consulting
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Lead Security Architect employer: Tata Consultancy Services
Contact Detail:
Tata Consultancy Services Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Lead Security Architect
✨Tip Number 1
Network with professionals in the field of OT network security. Attend industry conferences, webinars, or local meetups to connect with others who work in similar roles. This can help you gain insights into the latest trends and potentially lead to referrals.
✨Tip Number 2
Familiarise yourself with the specific frameworks mentioned in the job description, such as NIST and ISO27001. Being able to discuss these frameworks in detail during interviews will demonstrate your expertise and alignment with the company's needs.
✨Tip Number 3
Prepare to showcase your experience in engaging senior stakeholders. Think of examples where you've influenced decisions or led projects, as this will be crucial for the role. Practising how to articulate these experiences can set you apart.
✨Tip Number 4
Stay updated on the latest developments in OT network security. Subscribe to relevant publications or follow thought leaders in the industry. This knowledge can help you answer questions confidently and show your passion for the field during interviews.
We think you need these skills to ace Lead Security Architect
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights your experience in Network Security Architecture, especially in OT environments. Use specific examples that demonstrate your ability to engage with senior stakeholders and deliver complex security architectures.
Craft a Compelling Cover Letter: In your cover letter, express your passion for the role and how your skills align with TCS's mission. Mention your familiarity with frameworks like NIST and ISO27001, and how you can contribute to their security architecture strategy.
Showcase Relevant Certifications: List any relevant certifications such as CISSP, CCSP, or TOGAF prominently in your application. This will help demonstrate your qualifications and commitment to the field of security architecture.
Prepare for Skill-Based Discussion: Anticipate questions related to threat modelling, risk assessment, and secure network design. Be ready to discuss your previous experiences and how they relate to the responsibilities outlined in the job description.
How to prepare for a job interview at Tata Consultancy Services
✨Understand the Role Thoroughly
Before the interview, make sure you have a deep understanding of the Lead Security Architect role. Familiarise yourself with key responsibilities such as defining network security architecture strategy and collaborating with various teams. This will help you articulate how your experience aligns with their needs.
✨Prepare for Technical Questions
Expect to be asked about your experience with network security architecture, threat modelling, and risk assessment. Brush up on relevant frameworks like NIST and ISO27001, and be ready to discuss how you've applied these in past roles. Real-world examples will demonstrate your expertise.
✨Showcase Your Stakeholder Engagement Skills
Since the role involves influencing senior stakeholders, prepare examples that highlight your ability to engage and communicate effectively across different levels of an organisation. Think of situations where you successfully navigated complex discussions or drove decisions through collaboration.
✨Demonstrate Your Knowledge of Current Trends
Stay updated on the latest developments in OT network security and Zero Trust principles. Be prepared to discuss how these trends impact security architecture and how you would implement them in the role. This shows your commitment to continuous learning and innovation.