Costin Stefan
Profile

Platform and infrastructure engineer with 15+ years of experience designing and operating complex systems across on-prem and cloud environments. Specialized in Kubernetes/OpenShift platforms, infrastructure architecture, and automation at scale, with a focus on reliability and security.

I’ve worked in regulated industries, telecom, healthcare, acting as technical lead and trusted advisor. My career started in deep network engineering (BGP, OSPF, MPLS at ISP scale) and evolved into platform engineering and cloud-native systems.

Currently working at HPE, where I own multi-cluster OpenShift platforms and have built automation frameworks that reduced manual intervention across complex delivery pipelines.

I also consult on platform engineering challenges. If you have a hard infrastructure problem that needs both technical depth and clear communication, reach out.

Experience
  • Feb 2018 – Present

    Lead Platform Engineer / Infrastructure Owner

    HPE

    Designed and operated multi-cluster OpenShift/Kubernetes platforms, defining deployment patterns for stateful systems (Kafka, PostgreSQL/Patroni, ETCD). Architected a complex telecom platform with 40+ components across 8 environments. Delivered Security Scanning as a Service generating ~$60k/year per project. Owned 3 regional infrastructure labs with 100+ physical servers spanning VMware, OpenStack, and OpenShift.

  • 2016 – 2018

    Senior Network Consultant

    NNIT

    Led zero-downtime migration of a core network router, ensuring service continuity for production traffic. Migrated network monitoring platform to HP NNMi. Operated and optimized enterprise routing (OSPF/BGP) and wireless environments.

  • 2015 – 2016

    Senior Network Engineer

    Edwards

    Owned EMEA network infrastructure across 18 countries and 20+ sites, supporting ~5,000 devices in a GxP-regulated medical environment. Designed and implemented enterprise network solutions ensuring HA and compliance. Led network lifecycle activities: procurement, deployment, upgrades, and vendor coordination.

  • 2014 – 2015

    Senior Network Engineer

    Accenture

    Contributed to the deployment of a global WAN infrastructure including routing, switching, and MPLS L3VPN configurations. Built and tested MPLS L3VPN environments, validating failover and QoS scenarios.

  • 2013 – 2014

    Senior Network Engineer / NOC Shift Lead

    DHL IT Services

    Acted as Shift Lead within a global NOC, coordinating operations, incident response, and escalation handling across international teams. Played a key role in the insourcing of NOC operations. Provided L2/L3 support for critical network infrastructure ensuring stability of global telecom services.

  • 2012 – 2013

    Network Engineer

    AT&T

    Supported operation of a large-scale, multi-vendor telecom network across routing, transport, and service architectures.

  • 2006 – 2011

    Network Engineer / NOC IP Engineer / Team Lead

    RCS-RDS

    Progressed from technical support to network engineering and team leadership within a large ISP. Operated and maintained a large-scale Metro Ethernet/IP network in Bucharest with multi-vendor equipment (Cisco, Juniper, Huawei, ZTE). Acted as Team Lead within the Network Monitoring Center, serving as first escalation point for major incidents.

Certifications
  • Certified Kubernetes Administrator (CKA)
  • Certified Kubernetes App Developer (CKAD)
  • Certified Scrum Developer
  • F5 Certified BIG-IP Administrator
  • Cisco certifications
  • Juniper certifications
  • Palo Alto certifications