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Security Architect - Platform Engineering

Hackajob LtdCharing Cross, Central London🇬🇧United KingdomPosted 25 Sept 2026

Why This Role Stands Out

This hybrid Security Architect role offers a fantastic opportunity to shape cutting-edge platform security at a globally recognized company, fostering your expertise in a dynamic and collaborative environment. If you're a mid-senior security professional eager to drive architectural strategy and engage with emerging technologies, you'll thrive here.

Quick Overview

Seniority
Mid Senior
Employment type
Full Time
Work mode
Hybrid
Location
Charing Cross, Central London, United Kingdom
Posted
18 hours ago
LLMActive DirectoryTCP/IPHTTPS

Job Description

Colt provides network, voice and data centre services to thousands of businesses around the world, allowing them to focus on delivering their business goals instead of the underlying infrastructure.

Why we need this role

The primary purpose of this roleisbeaSecurity Architectwiththe Security and Resilience - Security Architecture,team,in order tobe eligible of this role, you will be capable of acting assubject matter expert on security framework architecture and standards for network, platforms and security components.

The role will have close interaction with the Security Engineering, SOC, Threat intelligence team and Risk functions within the wider department and will participate in researching emerging technologies, products, services and architectures, to work with the various Colt technology groups (DIO, Network Engineering, ServiceDelivery )in producing, delivering and validating the Colt wide end-to-end architecture.

The role is a combination of internal activities and accountabilities (defining the target architecture for your domain, initiating and/or leading important transformations and new wide-scale deployments, supporting the design and engineering teams) as well as external activities (working with key vendors and start-ups, engaging with customers and the sales organisation and participating to industry forums and events).

Join us and you will be part of a fast-growing community of like-minded experts to grow and learn alongside you in your career.

What you will do
  • Design, deliver andmaintain the end-to-end target architecture for the security domain
  • Work with your architecture, designand engineering peers to align the architecture to the Colt technology landscape
  • Design and consult on security elements for new product and technology introductions and support compliance/security enforcement projects
  • Ensure Colt networks are compliant with relevant regulations, standardsand frameworks such asTSA,DORA, ISO27001and more
  • Technology watching andability totranslate research into actionable dataand present up to management(research memos, strategy papers, etc)
  • Work with the Colt Business Units on strategic initiatives and support key transformational or wide-scale projects
  • Support the product portfolio and product engineering teams on products and services strategy and developments
  • Participate to and represent Colt at industry bodies
  • Conductcapability mapping exercises
  • Ensure all newimplmentations/changeacross the entireColt landscape are following Secure by Design approach
  • Assistwith development, planning and delivery of Hackathons and other employee security awareness initiatives such as Security Awarenessweek
What we're looking for

Must haves:

  • 3years+ technical knowledge and practical experience in information security in a large-scale enterprise or telecommunications industry environments.
  • 5 years experienceand advancedunderstanding of information security concepts related to private and public cloud providers and services, and key cloud design concepts such as IaaS, PaaS,SaaS and their differences as well as M365 security with specific coverage of E5 security capabilities.
  • Able to translate the technical security jargon into clearly understood business language.
  • Experience in conducting risk assessments in accordance witha recognized risk assessment/managementmethodology.
  • Engineering degree or equivalent (networking, computing/computer science, etc). Pure work experience also accepted.
  • Good understanding or above of software-defined concepts and technologies (SDN) as well as NFV concepts and technologies.
  • Understanding of network technologies (Role of Switches/Routers in network, TCP/IP IP stack, Knowledge of protocols such as HTTPS, SNMP, NTP, Telnet, SSH) as well as security enabling technologies (Firewalls, IDS/IPS, content filtering platforms, proxies, DMZ, anti-malware, anti-spam, anti-ransomware, anti-DDOS, NAC and MDM technologies)
  • Entry level experience of UNIX and/ or MS Windows including Active Directory.
  • Strong teamplayer able to lead small teams of senior architects/engineers, driveprojectsand activities.
  • Good presenting and inter-personal skills (C-level, customer meetings, vendor management, speaking at conferences, publishing thought leadership, active participation to SDOs and other industry forums)
  • Good combination of creative and analytical skills, able to deliver complex documents and "connect the dots".

Might haves:

  • Experience in AI (LLM) security,guardails, DLP, understanding of risk such as Prompt Injection and ModelPoisioning etc.
  • Good understanding of Telecoms Security Act requirements, contained with the Code of Practise.
What we offer you:

Looking to make a mark?

At Colt, youll make a difference. Because around here, we empower people. We dont tell you what to do.

Instead, we employ people we trust, who come together across the globe to create intelligent solutions.

Our global teams are full of ambitious, driven people, all working together towards one shared purpose: to put the power of the digital universe in the hands of our customers wherever, whenever and however they want.

We give our people the opportunity to inspire and lead teams, and work on projects that connect people, cities, businesses, and ideas. We want you to help us change the world, for the better.

Diversity and inclusion

  • Inclusion and valuing diversity of thought and experience are at the heart of our culture here at Colt. From day one, youll be encouraged to be yourself because we believe thats what helps our people to thrive. We welcome people with diverse backgrounds and experiences, regardless of their gender identity or expression, sexual orientation, race, religion, disability, neurodiversity, age, marital status, pregnancy status, or place of birth.

Most recently we have:

  • Signed the UN Women Empowerment Principles which guide our Gender Action Plan
  • Trained 60 (and growing) Colties to be Mental Health First Aiders
  • Please speak with a member of our recruitment team if you require adjustments to our recruitment process to support you. For more information about our Inclusion and Diversity agenda, visit our DEI pages.

Benefits

Our benefits support you through all parts of life, for both physical and mental health.

  • Flexible working hours and the option to work from home.
  • Extensive induction program with experienced mentors and buddies.
  • Opportunities for further development and educational opportunities.
  • Global Family Leave Policy.
  • Employee Assistance Program.
  • Internal inclusion & diversity employee networks.

A global network

  • When you join Colt you become part of our global network. We are proud of our colleagues and the stories and experience they bring take a look at Our People site including our Empowered Women in Tech.

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