# Caleb Sargeant · Platform, Network & Security Engineer > Markdown copy of , generated from the same data as the page. **Networks, platforms and the glue between them.** I have worked in IT since 2012, specialising in platform engineering, automation, infrastructure as code, networking and security. I have run everything from bare-metal server rooms to virtualised platforms and cloud-native architectures, and I care about systems that are reliable, maintainable and boring in production. - Platform, Network & Security Engineer, Eindhoven, Netherlands - 13 years in IT, since 2012 - Open to platform, cloud and network/security engineering conversations. [View the CV](https://calebsargeant.com/cv/) · [Download PDF](https://calebsargeant.com/downloads/Caleb_Sargeant_CV.pdf) · [GitHub](https://github.com/CalebSargeant) - Years in IT: 13+ - Engineering roles: 13 - Countries worked in: 2 - Certifications: 8 ## What I am on at the moment The seats I currently hold, and what I am studying around them. ### Cloud Engineer, PinkRoccade June 2025 to present · 1 yr 3 mo · Permanent · Netherlands Cloud and platform engineering for local-government software: Kubernetes platforms, infrastructure as code and the migration path off legacy application stacks. Stack: Kubernetes, Azure, Terraform, GitHub Actions, Helm, Linux, Python ### Co-Founder, Magma Moose March 2023 to present · 3 yr 6 mo · Founder · Remote · Netherlands Co-founded a development studio built around platform, cloud, network and security engineering, and its own developer tooling. I run the engineering: the shared infrastructure everything sits on, and most of the products on top of it. Stack: Terraform, Terragrunt, Kubernetes, FluxCD, Cloudflare, GitHub Actions, Python, FastAPI ### DevOps Engineer, tengen February 2023 to present · 3 yr 7 mo · Contract · Remote · South Africa Sole DevOps engineer for a multi-cloud estate: GitOps Kubernetes, Terraform modules, WireGuard/MikroTik networking, and the monitoring that keeps a production camera fleet honest. Stack: Kubernetes, FluxCD, Terraform, Ansible, AWS, Azure, GCP, Docker Currently studying: AWS SysOps Administrator, AWS DevOps Engineer, AWS Security Specialty, Python, Kubernetes (CKA) ## Four things, and the overlap between them Most of my work sits where two of these meet, which is usually where things break. ### Platform engineering Kubernetes, Terraform and GitOps, and the internal platform on top of them, so a product team can bootstrap its own environments and repositories without waiting on me to do it by hand. ### Cloud infrastructure Azure and AWS built as code rather than clicked together: AKS and EKS, networking, identity, and the unglamorous work of lifecycle rules and right-sized instances that keeps the monthly bill defensible. ### Networks Routing, switching, firewalls and VPNs on Cisco, MikroTik and FortiGate, from a global multi-datacentre network on BGP and HSRP down to a single remote camera that has to come back on its own after a reboot. ### Security Hardening, identity and the application-security toolchain: SSO, MFA and PKI on one side, Dependency-Track, SonarQube, Trivy and ZAP wired into CI on the other, with findings tracked until they are actually closed. ## Rated the way I would rate a colleague Five is daily and deep. Three means it is running in production and I would keep the documentation open. The years are how long the thing has been in my hands. ### Platform & orchestration - Kubernetes & Docker: Level 5 of 5, 6 yr - Helm & Kustomize: Level 5 of 5, 5 yr - GitOps (FluxCD, Argo): Level 5 of 5, 4 yr - Terraform: Level 5 of 5, 6 yr - Ansible: Level 4 of 5, 8 yr - CI/CD (GitHub Actions, Jenkins, TeamCity, GitLab, Bitbucket): Level 5 of 5, 9 yr - Git: Level 5 of 5, 12 yr ### Cloud - Azure (AKS, ACR, APIM, Entra ID): Level 5 of 5, 4 yr - AWS (EKS, VPC, IAM, S3, WAF): Level 4 of 5, 7 yr - GCP: Level 3 of 5, 3 yr - OpenStack: Level 3 of 5, 3 yr - Cost optimisation & FinOps basics: Level 4 of 5, 5 yr ### Networking - Routing & switching (Cisco, MikroTik): Level 5 of 5, 11 yr - Firewalling (Cisco FTD/ASA, FortiGate, MikroTik, SonicWall): Level 5 of 5, 10 yr - VPN (remote access and site-to-site): Level 5 of 5, 10 yr - TCP/IP, DNS, DHCP, LDAP, PKI: Level 5 of 5, 12 yr - BGP, OSPF, EIGRP, HSRP: Level 4 of 5, 8 yr - Wireless (Ubiquiti, Meraki, MikroTik): Level 4 of 5, 9 yr ### Security - Network & workload hardening: Level 5 of 5, 10 yr - Identity & SSO (Entra ID, SAML, Duo, JumpCloud): Level 4 of 5, 6 yr - AppSec toolchain (Dependency-Track, DefectDojo, SonarQube, Trivy, ZAP): Level 4 of 5, 4 yr - Secrets management (SOPS, Key Vault, 1Password): Level 4 of 5, 5 yr - Pentesting & vulnerability response: Level 3 of 5, 6 yr - ISO 27001 & security governance: Level 3 of 5, 3 yr ### Observability & data - Prometheus, Grafana, Alertmanager: Level 5 of 5, 6 yr - Zabbix & Nagios: Level 4 of 5, 8 yr - ELK / Graylog / Datadog: Level 4 of 5, 6 yr - MongoDB, MySQL, PostgreSQL: Level 3 of 5, 7 yr ### Systems & scripting - Linux (Ubuntu, CentOS, RHEL): Level 5 of 5, 12 yr - Bash: Level 5 of 5, 12 yr - Python: Level 4 of 5, 6 yr - PowerShell: Level 3 of 5, 6 yr - Windows Server (2003 onwards): Level 4 of 5, 12 yr Also worth saying: Agile methodologies, Documentation as a habit, Problem solving, Team player, Time management, Clear communication, Customer service ## The last four seats 13 roles since 2012, from an MSP helpdesk to platform engineering. The full timeline, with every duty, is on the experience page. ### Cloud Engineer, PinkRoccade Jun 2025 to Present · 1 yr 3 mo · Netherlands Cloud and platform engineering for local-government software: Kubernetes platforms, infrastructure as code and the migration path off legacy application stacks. ### Platform Engineer, Budget Thuis Jan 2024 to May 2025 · 1 yr 4 mo · Amsterdam, Netherlands Azure platform engineering for a Dutch energy and telecoms provider: AKS, Terraform, the internal developer platform, and the CI/CD that hundreds of .NET services ship through. ### Co-Founder, Magma Moose Mar 2023 to Present · 3 yr 6 mo · Remote · Netherlands Co-founded a development studio built around platform, cloud, network and security engineering, and its own developer tooling. I run the engineering: the shared infrastructure everything sits on, and most of the products on top of it. ### DevOps Engineer, tengen Feb 2023 to Present · 3 yr 7 mo · Remote · South Africa Sole DevOps engineer for a multi-cloud estate: GitOps Kubernetes, Terraform modules, WireGuard/MikroTik networking, and the monitoring that keeps a production camera fleet honest. [All 13 roles](https://calebsargeant.com/experience/) · [Certifications and courses](https://calebsargeant.com/education/) ## Worth a conversation? Open to platform, cloud and network/security engineering conversations. Pick a slot, or send an email and I will come back to you. - [Book a call](https://cal.com/calebsargeant/personal) - [contact@calebsargeant.com](mailto:contact@calebsargeant.com) - [+31 68 201 6886](tel:+31682016886) - [CV (PDF)](https://calebsargeant.com/downloads/Caleb_Sargeant_CV.pdf) - [JDs & Duties (PDF)](https://calebsargeant.com/downloads/Caleb_Sargeant_JDs_and_Duties.pdf) - [Cover letter (PDF)](https://calebsargeant.com/downloads/Caleb_Sargeant_Cover_Letter.pdf)