45 Network Maintenance jobs in the United Kingdom

Location: London (Hybrid - 1 day onsite)
Type: Contract (6 Months)
Day Rate: 510-595 GBP (Inside IR35)
Start Date: ASAP

We are seeking an experienced Network Security Engineer to lead the design, deployment, and management of Zscaler ZPA and ZIA solutions across our enterprise network. This is a hands-on role requiring deep technical expertise, with the opportunity to shape and secure network access for both cloud and on-premises environments. You will work closely with IT, security, and compliance teams to deliver secure, scalable, and policy-compliant infrastructure.

• Design, deploy, and manage Zscaler ZPA and ZIA solutions across the organisation.

• Integrate Zscaler platforms with identity providers (IdPs) , SIEM tools , and endpoint security platforms .

• Monitor and optimise Zscaler configurations, including policies, access rules, and application segments.

• Troubleshoot and resolve issues relating to DNS filtering , SSL inspection , traffic forwarding , and secure access .

• Collaborate with cross-functional teams to ensure secure and compliant network architecture.

• Maintain up-to-date documentation for all relevant Zscaler configurations and operational procedures.

• Stay informed on emerging threats, platform updates, and industry best practices.

• Troubleshoot application connectivity within cloud environments.

• Use basic Linux commands for script execution, key updates, cron job management, and connection troubleshooting.

• Contribute to the design and documentation of on-premises , cloud , and ZPA network architecture , ensuring alignment with security best practices.

• Minimum 8 years’ experience in network security or a closely related discipline.

• At least 2 years of hands-on experience with Zscaler ZPA and ZIA .

• Strong understanding of TCP/IP , DNS , VPNs , firewalls , and proxy technologies .

• Proven experience with cloud platforms such as AWS, Azure, or GCP, and working knowledge of Zero Trust architecture .

• Familiarity with identity and access management (IAM) and SAML/SSO integrations.

• Proficient in the use of network and security monitoring tools such as Wireshark , Splunk , or similar.

• Good understanding of routing protocols , such as OSPF and BGP .

• Strong problem-solving abilities and effective communication skills.

• Zscaler certifications (e.g. ZCCA-IA , ZCCA-PA , or Zscaler Certified Cloud Professional ).

• Experience with network automation or scripting (e.g. Python, PowerShell, Bash).

• Familiarity with infrastructure-as-code tools , such as Terraform or Ansible.

• Understanding of SASE (Secure Access Service Edge) frameworks.

• Exposure to cloud security standards (e.g. CIS Benchmarks, NIST, CSA).

• Experience with ITSM tools like ServiceNow.

• Knowledge of endpoint protection platforms (e.g. CrowdStrike, SentinelOne).

• Working knowledge of Active Directory and Azure Active Directory.

• Involvement in security audits or compliance assessments.

• Understanding of regulatory frameworks such as ISO 27001 , GDPR , or SOC 2.

• Experience supporting global enterprise networks.

• Previous experience working in a regulated industry such as finance, healthcare, or government.

Please emailyour CV to for immediate consideration.

Overview

OpenAI’s Platform and Infrastructure Engineering organization advances the mission of deploying artificial general intelligence (AGI) for the benefit of all by delivering secure, scalable, and resilient technology solutions. Our team builds and maintains robust infrastructure that safeguards OpenAI’s data and systems while ensuring employees are well-equipped and seamlessly connected. By prioritizing security, reliability, and user-centric solutions, we empower OpenAI employees to drive impactful AI research, corporate operations, and product innovation.

About the Role

As a Network Security Engineer at OpenAI, you will play a critical role in architecting and maintaining both campus and cloud network infrastructure. You will design and implement secure, scalable, and high-performing network solutions that bridge on-premises environments with public cloud environments. Your expertise in routing and switching will ensure optimal network performance and reliability across diverse environments. You will drive automation initiatives through Infrastructure-as-Code (IaC) and GitOps methodologies, streamlining network provisioning, enforcing configuration consistency, and optimizing corporate technology workflows. Your responsibilities will also include developing CI/CD pipelines tailored for corporate infrastructure, enhancing deployment efficiency, and integrating robust network security measures. You will establish comprehensive observability and proactive issue resolution strategies.

We are seeking individuals passionate about network automation, security, and scalable IT solutions that enhance both campus and cloud network operations. You should possess extensive experience with enterprise network technologies, alongside a strong foundation in network security fundamentals. In this role, you will collaborate closely with Security, IT, and Engineering teams to align automation workflows with Zero Trust principles, enforce role-based access controls, and implement security best practices across network infrastructure. If you excel in cross-functional settings and have a proven track record of delivering innovative, secure network solutions, this role offers a unique opportunity to shape OpenAI’s security-first, automation-driven network ecosystem.

Responsibilities

• Design, build, implement, and maintain secure, scalable, and performant network infrastructure, automation workflows, and network security solutions.
• Drive critical network and IT automation through software development and first-party tooling to optimize network operations, streamline infrastructure management, and enhance IT service delivery.
• Leverage modern Infrastructure-as-Code (IaC) methodologies and GitOps-driven automation to orchestrate network infrastructure, enforce configuration consistency, and scale IT workflows efficiently.
• Build and maintain CI/CD pipelines for corporate technology infrastructure, deploying to progressively tested environments across multiple clouds (Azure, AWS, GCP).
• Design and implement scalable, network-focused internal tools and dashboards to streamline network operations, optimize network workflows, and provide real-time visibility into network performance.
• Collaborate with security teams to align automation initiatives with Zero Trust principles and compliance frameworks.
• Implement role-based access controls (RBAC) and mitigate security risks through automated policies.
• Work cross-functionally to identify areas for network technology service improvement and implement self-service solutions.
• Manage multiple projects and initiatives, ensuring efficiency and alignment with business objectives.

You may be a fit for this role if you have:

• Strong experience with Cisco IOS, Cisco Meraki, Palo Alto or similar Enterprise network vendors.
• Strong Routing and Switching experience including routing protocols (BGP, OSPF and MPLS).
• Experience with Network monitoring tools/protocols and logging pipelines like SNMP, Syslog, Netflow, Elasticsearch (ELK Stack) and Grafana.
• Strong understanding of network security principles including ACLs, Firewalls, VPN, 802.1x authentication, profiling and RBAC.
• Proficiency in a modern programming language (Python, Golang, Ruby, etc.).
• Strong knowledge of and experience with cloud platforms (Azure, AWS, GCP) and infrastructure management.
• Experience managing corporate infrastructure at scale with Infrastructure-as-Code (IaC) practices & GitOps workflows (Terraform, Ansible, Chef, etc.) as well as cloud automation best practices.
• Experience integrating corporate IT infrastructure with CI/CD pipelines and DevOps workflows.
• Proven track record of developing and maintaining internal tools to streamline IT operations and business processes.
• Demonstrated experience developing internal automation solutions, such as Slack bots and integrations.
• Excellent stakeholder management skills and ability to work cross-functionally with IT, security, and business teams.
• Clear and concise communication skills to explain technical concepts to both technical and non-technical audiences.
• A self-starter with strong analytical and problem-solving skills.
• Understanding of wireless design, channel planning and site surveys.

You might thrive in this role if you have:

• Expertise and experience with SSL Inspection.
• Deep experience with containerization technologies such as Docker and Kubernetes.
• Experience with campus LAN/WAN implementations including DWDM and optical networking.
• Experience with and knowledge of data center best practices including architecture design and interconnects.

This role is based in London, UK. We use a hybrid work model of 3 days in the office per week and offer relocation assistance to new employees.

About OpenAI

OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the boundaries of the capabilities of AI systems and seek to safely deploy them to the world through our products. AI is an extremely powerful tool that must be created with safety and human needs at its core, and to achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity.

We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic.

Qualified applicants with arrest or conviction records will be considered for employment in accordance with applicable law, including the San Francisco Fair Chance Ordinance. For unincorporated Los Angeles County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: protect computer hardware entrusted to you from theft, loss or damage; return all computer hardware in your possession (including the data contained therein) upon termination of employment or end of assignment; and maintain the confidentiality of proprietary, confidential, and non-public information. In addition, job duties require access to secure and protected information technology systems and related data security obligations.

We are committed to providing reasonable accommodations to applicants with disabilities, and requests can be made by contacting OpenAI’s team. We welcome applications from all qualified individuals.

At OpenAI, we believe artificial intelligence has the potential to help people solve immense global challenges, and we want the upside of AI to be widely shared. Join us in shaping the future of technology.

Project Manager – Network Security | Up to £100,000 + Package | UK Remote

Stealthwatch are proud to be partnered with a global leader in network security solutions , currently seeking an experienced Project Manager to join their growing team. This is a fantastic opportunity to work with cutting-edge technology, leading high-profile projects that protect some of the world’s most critical networks.

The Role

As a Project Manager, you will be responsible for delivering complex security projects on time, within scope, and within budget. You’ll work closely with internal teams and external clients, ensuring seamless execution and excellent customer experience.

Key Responsibilities:

• Lead and manage end-to-end delivery of security-related projects
• Develop project plans, manage resources, and track progress against milestones
• Identify and mitigate risks, ensuring projects remain on schedule and aligned with business goals
• Act as the main point of contact for stakeholders, building strong client relationships
• Drive continuous improvement in project delivery methodology

About You

We’re looking for a strong communicator and organised problem-solver with a proven track record in project management within IT or cyber security.

Essential Skills & Experience:

• Demonstrable experience as a Project Manager in IT / Network Security projects
• Strong stakeholder management and communication skills
• Ability to manage multiple projects simultaneously in a fast-paced environment
• Project management certification (PMP, Prince2, Agile, or equivalent) preferred

What’s on Offer?

• Up to £100,000 basic salary + competitive package
• Opportunity to work with a world-leading security vendor
• Remote role – based anywhere in the UK
• Excellent career growth and professional development opportunities

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This is an exciting opportunity to shape the infrastructure of our community while working with a team committed to innovation, sustainability, and public service excellence.

• Design and Deliver highway improvement schemes, from concept through to implementation.

• Project Management of construction projects, ensuring timely and cost-effective delivery.

• Oversee Section 278 agreements including design reviews, legal facilitation, and compliance monitoring.

• Provide expert design advice to internal teams, developers, and external contractors.

• Conduct site inspections , supervise contractors, and ensure quality standards are met.

• Prepare and manage financial documentation , reports, and contracts.

• Represent the council at public inquiries , committee meetings, and stakeholder consultations.

• Deputise for the Engineering & Design Team Leader when required.

• Contribute to the development of local transport programmes and service-wide performance indicators.

• Maintain excellent working relationships with Councillors, MPs, public bodies, developers, and community groups.

• HND (or equivalent) in Civil Engineering or demonstrable equivalent technical/procedural knowledge.

• Substantial experience in highway construction , project delivery, and stakeholder management.

• Advanced knowledge of project management processes , national and local highway standards.

• Proficiency in AutoCAD, Key Systems , and general construction management software.

• Strong verbal and written communication skills, with proven ability to present complex technical information.

• Ability to analyse, plan, cost , and report on complex engineering projects.

• A full UK driving licence .

• ILM Level 5 or other relevant management qualification .

• PRINCE2 or equivalent project management certification.

• Working understanding of wider planning policies and standards.

• Background in live stakeholder engagement and presenting technical issues to non-technical audiences.

This role provides a fantastic opportunity to make a real difference in the design and delivery of highway projects that impact thousands of road users. Youll join a forward-thinking team passionate about improving infrastructure and driving excellence in public service.

Please apply via CV

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