Nadia Petrosyan Senior Infrastructure Engineer
Ames, IA • nadia.petrosyan@gmail.com • +1 515-555-0182
Profile Summary
- Senior Infrastructure Engineer with 9 years of experience running hybrid data center and cloud infrastructure for a farm equipment maker and a retirement and insurance company, focused on compute, storage, and disaster recovery.
- Hands-on with Linux and virtualization (RHEL 9, VMware vSphere 8), cloud (AWS, Microsoft Azure), infrastructure as code (Terraform, Ansible), containers (Kubernetes, Rancher), networking (Arista EOS, F5 BIG-IP), storage and backup (NetApp ONTAP, Veeam), and monitoring (Prometheus), with a solid grounding in TCP/IP, BGP, and Python scripting.
- Deep experience in data center consolidation, vSphere cluster design, hybrid networking with AWS, and storage tiering, following peer-reviewed infrastructure as code and twice-yearly failover tests to deliver infrastructure that keeps factories and dealers running through planting and harvest.
- Works closely with application owners, network and security engineers, facilities, and hardware vendors in a weekly infrastructure change review, from rack layouts and power budgets to cutover plans the app owners sign off on before any weekend move.
- Coaches junior engineers on Terraform module design and Linux troubleshooting, runs the monthly capacity review, and keeps the build standards the operations team follows for every new server and cluster.
Technical Skills
- Operating Systems & Virtualization:
- RHEL 9, Ubuntu 24.04, Windows Server 2022, VMware vSphere 8, vCenter, Proxmox VE
- Cloud Platforms:
- AWS, Amazon EC2, Amazon VPC, AWS Direct Connect, Microsoft Azure
- Infrastructure as Code:
- Terraform, Ansible, Packer, HashiCorp Vault, GitLab CI
- Containers & Kubernetes:
- Kubernetes, Rancher, Cilium, Helm, Docker
- Networking & Load Balancing:
- TCP/IP, BGP EVPN, VXLAN, Arista EOS, F5 BIG-IP, Infoblox DNS, Palo Alto Networks
- Storage & Backup:
- NetApp ONTAP, Ceph, Pure Storage, Veeam, Zerto, Amazon S3
- Monitoring & Scripting:
- Prometheus, Grafana, Python, Bash, Git
Education
Work Experience
- Rebuilt the VMware vSphere 8 estate in both data centers as 22 clusters on Dell PowerEdge hosts, with every VM built from a Packer image hardened to the CIS benchmark, raising consolidation from 18 to 31 VMs per host.
- Moved server, network and DNS provisioning into Terraform modules and Ansible roles reviewed as GitLab merge requests, with a nightly drift check and secrets in HashiCorp Vault, cutting the time to deliver a production VM from 9 days to 40 minutes.
- Redesigned the data center network as a spine-leaf fabric on Arista switches with BGP EVPN and VXLAN, and added a second AWS Direct Connect link on a separate carrier, raising hybrid link uptime from 99.5% to 99.99%.
- Moved 1.8 PB off aging SAN arrays onto NetApp ONTAP for file shares and Ceph for object storage, with hourly snapshots and Veeam copies to an immutable Amazon S3 bucket, cutting cost per usable terabyte by 37%.
- Built 14 on-prem Rancher Kubernetes clusters for factory apps, with node pools in Terraform, Cilium networking and a quarterly upgrade calendar, taking every cluster through 4 minor versions with 0 minutes of app downtime.
- Set up Prometheus and Grafana dashboards for CPU, memory, storage and power per rack, plus a 12-month capacity forecast reviewed with finance every quarter, cutting rush hardware orders from 11 a year to 2.
- Replicated 160 tier-1 apps between the 2 data centers with Zerto and ran twice-yearly failover tests with their owners, bringing measured recovery time for the dealer ordering system from 9 hours to 55 minutes.
- Led the exit from a leased colocation site, retiring 640 end-of-life servers and moving 38 racks over 6 weekend cutovers with tested rollback plans, saving $1.2M a year in lease and support fees.
- Moved 210 load balancer virtual servers from end-of-life F5 hardware appliances to F5 BIG-IP Virtual Edition on VMware, testing each one against its health checks first, with 0 customer-facing outages during the move.
- Replaced the tape backup library with Rubrik and an offsite copy for every production database and file server, raising monthly restore test success from 82% to 99%.
- Wrote Python scripts that pulled host, VM and datastore use from vCenter into a weekly capacity report, giving the team 6 weeks of warning before a cluster ran short of memory.