Sergo S.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

With 10+ years of experience in Linux, DevOps, cloud, virtualisation, and network security, I deliver reliable, high-performance solutions for modern IT environments. Core Expertise: Linux & Unix Systems: Debian based , RHEL, macOS, Solaris , OpenBSD Networking & Cisco: Routing & switching (BGP, OSPF, EIGRP, MPLS), QoS, HSRP/VRRP/GLBP; CCNA-certified; modern firewall architecture. Security: Network and cloud protection, encryption, VPNs, Zero Trust frameworks, system hardening, compliance, vulnerability management, and security automation (SIEM & SOAR), pentest. Cloud & DevOps: AWS, Kubernetes, Docker, Terraform, Ansible, Puppet, Jenkins, GitHub Actions, Gitlab pipelines Virtualization & Containers: VMware ESXi, KVM, Proxmox, Docker, LXC/LXD Monitoring & Observability: Prometheus, Grafana, Zabbix, ELK stack Web & Load Balancing: Nginx, HAProxy, Varnish, Cloud Load Balancers (AWS ALB/NLB, GCP Load Balancers) Databases: MySQL, PostgreSQL, MongoDB, Elasticsearch Version Control & Collaboration: Git, GitHub, GitLab, Bitbucket