Senior IT Systems Engineer — On-Site LA, Hybrid Cloud

CultureMill Recruiting; Los Angeles (CA); On-site; USD 120,000 - 160,000; Full time

Job summary

CultureMill Recruiting is seeking a Senior IT System Engineer for a world-class hard-tech company in LA. You will bridge people, factory, and data, owning identity, endpoints, servers, storage, cloud, network, and security.

This hands-on role treats IT as a product and requires a practical mindset. From on-site work five days a week in Los Angeles, you’ll manage hybrid Microsoft 365, Entra ID, Azure, and on-prem Active Directory while scaling virtualization, Kubernetes, and secure networking

Qualifications

• 7+ years in systems administration or infrastructure engineering.
• 3+ years in a senior or lead role.
• Experience with both on-prem and cloud, across Windows and Linux.
• Hybrid M365, Entra ID, and Intune; Windows Server DNS/DHCP/RADIUS; Ubuntu and Red Hat.

Responsibilities

• Operate hybrid Microsoft 365, Entra ID, Azure, and Intune alongside on-prem Active Directory.
• Build and maintain Windows Server and hardened Ubuntu and Red Hat servers.
• Run virtualization and SAN storage, from provisioning to capacity planning.
• Own AWS infrastructure and administer Kubernetes on-prem and in EKS.
• Design and maintain the Layer 2/3 network and its segmentation, including OT zones.
• Operate Defender XDR, Sentinel, and pfSense, from detection tuning to incident response.
• Build automation and custom tools; join the on-call rotation.

Skills

Systems administration

Infrastructure engineering

Windows/Linux platforms

Hybrid M365 EntraID Intune

Cloud + on-prem

Networking L2/L3

PowerShell Bash

On-site LA

Education

Degree in computer information systems, computer science, or computer engineering

Tools

vSphere

Hyper-V

OpenShift

SAN storage (iSCSI/NFS)

Pure Storage

HPE 3PAR

AWS

Azure

GCP

Kubernetes

Defender XDR

Sentinel

pfSense

Job description

CultureMill Recruiting is seeking a Senior IT System Engineer for a world-class hard-tech company in LA. You will bridge people, factory, and data, owning identity, endpoints, servers, storage, cloud, network, and security.

This hands-on role treats IT as a product and requires a practical mindset. From on-site work five days a week in Los Angeles, you’ll manage hybrid Microsoft 365, Entra ID, Azure, and on-prem Active Directory while scaling virtualization, Kubernetes, and secure networking