Trouvez votre prochaine offre d’emploi ou de mission freelance Sécurité informatique

At CGI, we are shaping the future of defence technology through our role in one of the UK's most significant ICT transformation programmes. As a Solution Architect, you will take a lead in designing and defining high-value solutions that directly contribute to mission success for the Defence client. You'll play a central role in delivering complex, secure, and scalable ICT services that drive operational excellence, while being part of a collaborative team that values creativity, ownership, and innovation. This is your opportunity to help influence a multi-£100M programme, expand CGI's footprint in Defence, and deliver lasting impact for our clients and the UK. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK 'Best Employer' by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go. Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This position will have frequent onsite commitments in Reading and Chippenham.

Security Operations Centre (SOC) Analyst - Tier 2 Location: Stoke-on-Trent, United Kingdom Employment Type: Permanent, Full-Time Department: Security Operations Salary: Up to £55,000 per annum + shift allowance Working Hours: Rotating shifts (early, late, and nights) on a 4-days-on rota. About the Role We are seeking a proactive Tier 2 SOC Analyst to join a 24x7 Security Operations Centre. You will investigate and manage complex security incidents, support threat hunting activities, and act as an escalation point for Tier 1 analysts. This role offers an excellent opportunity to further develop your technical expertise while helping to strengthen and mature the organisation's security operations capability. Key Responsibilities Lead the triage, investigation, and resolution of medium to high-severity security incidents. Monitor and analyse security events using SIEM, EDR, and other security tools. Act as an escalation point and mentor for Tier 1 analysts. Perform threat analysis and share intelligence across teams. Tune and improve SIEM rules and detection capabilities. Support vulnerability management and remediation activities. Produce incident reports, metrics, and post-incident reviews. Collaborate with Infrastructure, Network, and Development teams to improve security posture. Skills & Experience 1-5 years' experience within a SOC or similar security operations environment. Hands-on experience with incident response, security monitoring, and threat analysis. Experience using SIEM, EDR, and vulnerability management tools. Good understanding of security operations processes, attack techniques, and incident management methodologies. Strong analytical and problem-solving skills. Qualifications (Desirable) Degree in Cyber Security, Information Security, Computer Science, or equivalent experience. Relevant certifications such as CompTIA Security+, CEH, CCSP, CISSP, BTL1, BTL2, or SIEM/vendor-specific certifications. Due to the nature and urgency of this post, candidates holding or who have held high level security clearance in the past are most welcome to apply. Please note successful applicants will be required to be security cleared prior to appointment which can take a minimum 10 weeks. LA International is an award-winning partner of choice for many of the world's most influential companies and government organisations. Holding Enhanced Government Security Accreditation, we are recognised as the European market leader in the delivery of Security Cleared talent to organisations that demand the very highest levels of security, compliance and assurance. An award-winning organisation, having secured the prestigious Queens Award for Enterprise: International Trade over multiple years. We are committed to fostering an inclusive, equitable and accessible workplace where everyone feels valued and supported. We welcome applications from all individuals, regardless of background or identity, and we encourage candidates who may not meet every listed requirement to still apply. If you require any adjustments or support during the recruitment process, please let us know and we will work with you to ensure a fair and accessible experience. Please Note: If a high volume of applications is received, only candidates shortlisted will be contacted.

At CGI, we deliver mission-critical solutions that shape the future of secure digital services, and as a Scrum Master you will play a pivotal role in driving high-performing Agile teams to achieve meaningful outcomes for our clients. We empower our professionals to take ownership of delivery, champion innovative ways of working, and collaborate closely with stakeholders to unlock measurable value. Joining us means contributing to forward-looking programmes that demand excellence, resilience, and creativity, while being supported by a community committed to your growth and success. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK 'Best Employer' by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go. Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This is position predominately based on a secure site.

At CGI, we build secure, mission-critical systems that help shape the future of the UK's most important industries. As a DevOps Engineer, you'll play a key role in delivering resilient, scalable, and high-performing infrastructure that enables innovation and operational excellence for our clients. Working within collaborative, cross-functional teams, you'll have the opportunity to influence modern engineering practices, automate complex environments, and contribute to meaningful solutions with real-world impact. We empower our teams to take ownership, explore new ideas, and continuously develop their skills within a supportive environment where your contributions are recognised and your career can thrive. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK 'Best Employer' by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go. Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance.

The Space, Defence and Intelligence business unit in CGI is a true IT Systems Integrator. We work, build, and operate bespoke, technically complex, mission-critical systems which help our clients keep us all safe and secure. We bring innovation to our clients using proven and emerging technologies, agile delivery processes and our deep expertise across the breadth of space, defence, intelligence, aerospace and maritime, all underpinned by our end-to-end cyber capability. We work collaboratively with global technology companies, cutting edge SMEs and academia to deliver the optimal solution for each client. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK 'Best Employer' by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go. Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This position will be based on site near Chippenham 5 days a week.

At CGI, we design, build, and operate secure, mission-critical systems that help protect the UK while enabling clients to innovate with confidence. As an Automation Tester, you will use your expertise to design and maintain automation frameworks that validate complex applications and services. Your work will directly improve speed, quality, and resilience in delivery, giving clients the ability to focus on their most pressing challenges. This role offers the opportunity to work in a highly rewarding environment where collaboration, ownership, and creativity are at the heart of everything we do. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK 'Best Employer' by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go. Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This is a hybrid position but will require regular onsite attendance in Gloucester for secure system access.

The Space, Defence and Intelligence business unit in CGI is a true IT Systems Integrator. We work, build, and operate bespoke, technically complex, mission-critical systems which help our clients keep us all safe and secure. We bring innovation to our clients using proven and emerging technologies, agile delivery processes and our deep expertise across the breadth of space, defence, intelligence, aerospace and maritime, all underpinned by our end-to-end cyber capability. We work collaboratively with global technology companies, cutting edge SMEs and academia to deliver the optimal solution for each client. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named one of the 'World's Best Employers' by Forbes magazine. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a member not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go. As a DevOps Engineer within the Space, Defence and Intelligence business unit, you will apply your technical expertise to the design, implementation, testing and ongoing support of CGI's tool chain. With strong skills in Terraform and Azure, you will be responsible for the automation of the software development lifecycle.

Excellente opportunité – Expert Réseau Datacenter / Cloud Native (H/F) 🚨 Je recherche pour un client majeur du secteur Banque & Finance un Expert Réseau Datacenter afin d'intégrer une équipe en charge de l'évolution et du maintien en condition opérationnelle des infrastructures réseau. 🔎 Compétences recherchées : ✅ Kubernetes / OpenShift ✅ CNI (Cilium) ✅ Datacenter (VXLAN / EVPN) ✅ BGP, OSPF, MPLS ✅ SDN & Virtualisation réseau ✅ Load Balancing ✅ Observabilité & Supervision ✅ Cloud Native / IaaS ✅ Support N3 et expertise réseau 🎯 Votre mission : Référent technique sur la plateforme CNI Évolution des architectures réseau Cloud Native Automatisation et modernisation des infrastructures Support N3 et résolution d'incidents complexes Capacity Planning Documentation technique et transfert de compétences Veille technologique 📍 Profil recherché : ✔️ Bac+4/5 en Informatique, Réseaux ou Télécoms ✔️ Minimum 5 ans d'expérience sur des infrastructures Datacenter complexes ✔️ Anglais professionnel 💼 Mission longue durée au sein d'un environnement technique stimulant et innovant.

At CGI, we empower our architects to shape the future of secure digital transformation. As a Technical Architect, you'll design and deliver a next-generation on-premise identity solution that underpins the resilience and security of our clients' most critical systems. You'll help define and implement a scalable, future-ready access management platform that ensures seamless connectivity and trust across complex environments. This is your opportunity to take ownership of a greenfield solution that drives real-world impact, harnessing creativity and technical excellence to help CGI's clients stay ahead in an evolving digital landscape. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK 'Best Employer' by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go. Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance.

🚀 Missions principales 🔍 Analyse et gestion des risques Réaliser des analyses de risques applicatifs (web, mobile, microservices, N-tier) Identifier les menaces, scénarios de risques et impacts Définir les besoins de sécurité adaptés 🔐 Mise en œuvre de la sécurité Recommander des mesures de sécurité techniques Accompagner la remédiation des vulnérabilités et non-conformités Garantir l'intégration des bonnes pratiques sécurité dans les projets (Secure SDLC) 🏗️ Pilotage sécurité projet Intervenir sur toutes les phases projet (design → production) Coordonner les différentes équipes sécurité (IAM, Cloud, SOC…) Challenger les choix techniques (authentification, API, chiffrement…) 📊 Conformité et suivi Collecter et valider les preuves de mise en conformité Assurer l'alignement avec les standards internes et réglementaires 🔧 Amélioration continue Contribuer à l'évolution des frameworks et référentiels de sécurité Participer à des initiatives DevSecOps

As a Senior Network Engineer at CGI, you will play a pivotal role in safeguarding and advancing the networks that power our clients' most critical missions. You will help shape resilient, secure, and scalable infrastructure while contributing to innovative integration and design projects that drive industry transformation. This role offers the chance to take meaningful ownership of complex challenges, collaborate with expert teams, and apply your creativity to deliver future-ready network solutions. Supported by CGI's strong engineering community, you'll make a lasting impact across high-value programmes while continuously growing your skills in a dynamic and trusted environment. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK 'Best Employer' by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go. Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance.

CGI was recognised in the Sunday Times Best Places to Work List 2025 and named one of the World's Best Employers by Forbes. We offer a competitive salary, excellent pension, private healthcare, and a share scheme (3.5% + 3.5% matching), making you a CGI Partner rather than just an employee. We are committed to inclusivity and building a genuinely diverse community of technology professionals. CGI's Space, Defence and Intelligence business unit delivers innovative, mission-critical solutions to some of the UK government's most complex and challenging problems. We design, build, and operate bespoke, secure systems that help keep the nation safe and secure. Our work spans cloud, on-prem, and hybrid environments, underpinned by strong cyber and engineering best practices. We are seeking experienced Site Reliability Engineers to join our cross-functional teams supporting secure, cloud-based and big-data platforms. Working closely with clients and internal delivery teams, you will help design, build, operate, and continuously improve highly reliable, scalable systems within a secure environment. Due to the nature of the work, this role requires onsite attendance and applicants must be solely UK Nationals (not dual nationals and not visa holders) with existing HMG DV / HLC clearance.

Mission de l'équipe : Dans le cadre d'un programme stratégique de transformation au sein d'un acteur majeur de l'Asset Management, la mission consiste à accompagner la migration et l'intégration des données de référence vers la plateforme Aladdin. 1. Pilotage de la migration des données de référence La mission est responsable de l'accompagnement des travaux de migration des référentiels Security Master et Benchmark vers la plateforme Aladdin. Les principales activités consistent à : · Piloter les activités de migration des données de référence. · Coordonner les différentes parties prenantes impliquées dans le projet. · Assurer le bon déroulement des différentes phases de transition. 2. Définition et gouvernance des données La mission intervient en collaboration avec les équipes métiers et techniques afin de garantir la qualité des données migrées. Les principales responsabilités consistent à : · Recueillir et valider les besoins métiers relatifs aux données. · Définir et valider les mappings de données. · Veiller au respect des standards de gouvernance des données. · Garantir la cohérence et l'intégrité des données tout au long du processus de migration. 3. Validation et sécurisation de la migration La mission contribue à la sécurisation des livraisons de données avant leur mise en production. Les principales activités consistent à : · Participer aux campagnes de tests. · Réaliser les activités de réconciliation des données. · Valider les processus de migration. · Identifier et analyser les écarts de données. 4. Analyse des données et suivi des indicateurs La mission participe au pilotage de la qualité des données à travers l'analyse de volumes importants de données. Les principales activités consistent à : · Analyser de grands volumes de données. · Produire les analyses nécessaires aux activités de conversion des données. · Suivre les indicateurs de qualité et les KPI liés à la migration. · Contribuer à la résolution des anomalies identifiées. Prestations demandées : La mission interviendra principalement sur les activités suivantes : · Pilotage de projets Data en environnement Asset Management. · Migration des référentiels Security Master et Benchmark vers Aladdin. · Coordination des équipes métiers et IT. · Définition des besoins, mappings et règles de gouvernance des données. · Validation de la qualité, de la cohérence et de l'intégrité des données. · Participation aux tests, réconciliations et validations fonctionnelles. · Analyse de jeux de données volumineux et suivi des KPI. · Contribution au bon déroulement des différentes phases du projet.

Join CGI's Space, Defence and Intelligence business unit and play a critical role in delivering secure, resilient infrastructure solutions that support nationally significant programmes. As a Manual Infrastructure Tester, you will work within high-performing Agile delivery teams, collaborating with developers, infrastructure engineers, and project managers to ensure the successful testing and integration of complex systems across secure environments. This role offers the opportunity to contribute to high-impact projects while working with modern infrastructure technologies across Windows and Linux platforms. At CGI, you'll be empowered to take ownership, contribute innovative ideas, and grow your expertise within a collaborative and supportive team environment. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK 'Best Employer' by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go. Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance. This position will work full time on site near Basingstoke.

We are seeking an experienced and motivated Site Reliability Engineer (SRE) to join a high-performing team supporting multiple data product and platform groups. This role is focused on improving the reliability, scalability, observability, deployment, and operational support of critical data-driven platforms and services operating within complex production environments. The successful candidate will work closely with engineering, platform, and operational support teams to strengthen monitoring and alerting capabilities, improve logging and traceability, troubleshoot incidents, support deployments, and automate operational processes wherever possible. The environment includes Kubernetes, Helm, the ELK stack, and a broad range of modern Site Reliability Engineering and cloud platform practices. This is a hands-on technical role suited to someone who thrives in fast-paced operational environments, enjoys solving complex production issues, and is passionate about automation, platform reliability, and continuous improvement. The role requires strong collaboration with both client stakeholders and engineering teams to ensure operational excellence, platform resilience, and service availability across critical systems.

At CGI, we deliver secure, mission-critical systems that help safeguard the UK and enable transformation across some of the nation's most vital sectors. As a Data Architect, you will play a pivotal role in shaping data-driven solutions that are scalable, secure, and future-ready. Working with clients across highly complex projects, you'll apply your expertise to design and deliver architectures that drive innovation and resilience. This role gives you the chance to make a meaningful impact while working in a culture that values collaboration, ownership, and creativity. CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK 'Best Employer' by the Financial Times. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you'll be part of an open, friendly community of experts. We'll train and support you in taking your career wherever you want it to go. Please note, due to the secure nature of the programme, this role is open only to UK Nationals (not dual nationals or visa holders) who hold or are eligible for High-Level Clearance (HLC). While there is some flexibility for hybrid working, onsite attendance will be required in Gloucester or London for secure system access.