Optum / UnitedHealth Group
Senior Infrastructure Engineer through York Solutions
Led acquired-company infrastructure integrations, bringing technical teams and business stakeholders together around identity and infrastructure handoffs.
Chris Gillett
Senior Systems Engineer
I build, migrate, and troubleshoot enterprise infrastructure.
Selected projects
Open a project for the scope and my role.
Company integrationsFour acquired-company integrations
York Solutions / Optum, UnitedHealth Group
The work
Bring acquired companies into the enterprise environment, coordinating identity, cloud, virtualization, storage, and networking work across teams.
My role
Technical project lead for four completed integrations. I built task lists, delegated work, secured resources, and coordinated handoffs, including HR-approved user provisioning into Active Directory and Entra ID.
Active Directory, Entra ID, cloud infrastructure, cross-team delivery
Exchange Online migration5,000 users
The work
Migrate a 5,000-user organization from on-premises Exchange to Exchange Online.
My role
Project and technical lead. I defined the work, delegated responsibilities, and provisioned the resources needed to complete the migration.
Exchange Server, Exchange Online, Microsoft 365, migration planning
VMware Horizon upgrade2,000-user environment
Praxis / law firm engagement
The work
Upgrade a VMware Horizon environment serving 2,000 users, covering infrastructure hardware, software, and virtual desktops.
My role
Technical lead for the upgrade. I coordinated and delivered the infrastructure and desktop changes across the environment.
VMware Horizon, virtual desktops, infrastructure upgrades
Logging & recoveryCentralized visibility and restore testing
School district engagements through Robert Half
The work
Give infrastructure teams a central place to investigate logs, and verify that backups can actually be restored.
My role
Selected and implemented centralized logging at Long Beach USD. At Redondo Beach, I improved an inherited logging environment, consolidated routing, and tested backup recovery.
Graylog, Loki, Promtail, Grafana, backup and recovery
Experience
Hands-on engineering.
Ownership through delivery.
My IT career started in 1998. Since then, I’ve worked across enterprise infrastructure, client environments, migrations, and day-to-day operations.
View résuméLong Beach & Redondo Beach schools
Systems engineering engagements through Robert Half
Windows Server, Active Directory, VMware, Azure migration work, DFS, centralized logging, and backup recovery across district environments.
CG Solutions
Independent consulting and contracting
Infrastructure and endpoint projects, including a Windows migration spanning more than 1,500 endpoints and a 500-user integration into an existing Horizon environment.
About me
I like understanding
how the whole system fits.
My work crosses the boundaries between servers, identity, networks, storage, and cloud. That matters when a problem doesn’t stay neatly inside one team’s responsibility.
Outside client work, I build and experiment in my own lab with Proxmox, Linux, ZFS, containers, and automation. ChrisOps is my personal project exploring how AI and infrastructure automation can work together.
What I work with
- Systems & identity
- Windows Server, Active Directory, Entra ID, Linux, Microsoft 365
- Cloud & virtualization
- Azure, AWS, VMware, Horizon, Proxmox
- Automation & delivery
- PowerShell, Terraform, Ansible, GitHub Actions, Docker
- Data & connectivity
- Networking, F5, storage, ZFS, Samba, backup and recovery
Let’s talk infrastructure.
For systems engineering roles, project work, or a conversation about the experience above.
chris.gillett@cgillett.comParamount, California