Senior IT Infrastructure Engineer- AIX and Linux

A major client of Insight Global is seeking a Senior IT Infrastructure Engineer focused on AIX and Linux. This role will own reliability, security, and performance across AIX, Linux, VMware, storage, and DR—partnering closely with Security, AppDev, Data, and Networking. If you love deep-dive performance troubleshooting, have strong opinions about platform standards, and get excited about what modern tooling can do for infrastructure operations, this role was built for you.

Responsibilities
AIX, Linux, and platform lifecycle
Lead lifecycle management for AIX (LPARs, VIO, NIM) and Linux (RHEL/SLES/Ubuntu): provisioning, patching, kernel updates, tuning, and OS hardening.
Maintain platform standards: golden images, baselines, and configuration drift detection.
Tune OS and kernel parameters, multipathing, and I/O stacks for latency-sensitive workloads.
Virtualization, storage, and hybrid cloud
Administer and optimize VMware vSphere (ESXi, vCenter, DRS/HA, vMotion), HMC, and shared storage patterns including vSAN or enterprise arrays.
Operate hybrid IaaS/PaaS workloads in AWS/Azure: compute, storage, networking, identity integrations; apply landing zones and guardrails.
Enforce configuration management with Ansible, Terraform, and Git-based pipelines for repeatable deployments.
Service optimization and cost management
Analyze utilization and recommend rightsizing, reservations or savings plans, storage tiering, and archival strategies.
Automate to eliminate toil: scheduled automation, self-healing playbooks, autoscaling where appropriate.
Track and report cloud spend and data center TCO; propose optimizations and lifecycle retirements.
Standardize images and baselines to reduce variance and operational overhead.
Security, compliance, and risk management
Apply CIS benchmarks and vendor hardening guides for AIX, Linux, VMware, and cloud workloads; meet patch and vulnerability SLAs.
Integrate IAM and RBAC patterns across on-premises and cloud; enforce MFA, least privilege, and key rotation.
Implement encryption in transit and at rest, certificate lifecycle, and secrets management (for example HashiCorp Vault, cloud KMS).
Design, test, and exercise BC/DR runbooks including multi-site failover and restore validation.
Technical leadership, observability, and capacity
Provide architectural guidance on AIX/Linux modernization, VMware consolidation, storage rationalization, and cloud adoption.
Evaluate new tools through pilots and structured production onboarding.
Build observability across metrics, logs, and traces (for example Prometheus, Grafana, Splunk, SolarWinds).
Forecast compute, memory, network, and storage growth; drive procurement and expansion planning.
Documentation, reporting, and collaboration
Maintain architectural diagrams, runbooks, service catalogs, and CMDB or asset records.
Produce operational health, capacity, and cost dashboards; communicate risk registers and remediation.
Document incidents, RCAs, lessons learned, and onboarding guides.
Partner with Security, AppDev, Data, and Networking; coordinate vendors and MSPs to SLOs.
Champion AIX-to-Linux modernization and cloud migration pathways; own the platform rationalization roadmap and drive lifecycle retirements proactively. Champion reliability, automation, and continuous improvement as cultural defaults, not afterthoughts

We are a company committed to creating diverse and inclusive environments where people can bring their full, authentic selves to work every day. We are an equal opportunity/affirmative action employer that believes everyone matters. Qualified candidates will receive consideration for employment regardless of their race, color, ethnicity, religion, sex (including pregnancy), sexual orientation, gender identity and expression, marital status, national origin, ancestry, genetic factors, age, disability, protected veteran status, military or uniformed service member status, or any other status or characteristic protected by applicable laws, regulations, and ordinances. If you need assistance and/or a reasonable accommodation due to a disability during the application or recruiting process, please send a request to HR@insightglobal.com.To learn more about how we collect, keep, and process your private information, please review Insight Global's Workforce Privacy Policy: https://insightglobal.com/workforce-privacy-policy/.

10+ years administering UNIX/Linux platforms
AIX: Hands on experience supporting LPAR/VIOS architecture, NIM provisioning, mksysb and cloning, SEA/NPIV, LPM, ODM and device management, OS tuning, troubleshooting.
Linux: kernel parameters (sysctl), systemd, SELinux or AppArmor, multipathd, LVM, filesystems (ext4, xfs), kdump, performance tooling (perf, sar, iostat).
7+ years managing VMware vSphere in production (HA/DRS, Lifecycle Manager, clusters at scale).
5+ years managing enterprise storage (FC/iSCSI/NFS), snapshots, replication, and performance troubleshooting.
Hands-on automation with Ansible, scripting (Bash, Python), and Terraform for hybrid infrastructure.

Advanced AIX: POWER system architecture and LPAR density optimization, NIM automation at scale, TL/SP upgrade orchestration across large environments—building on but going beyond day-to-day LPAR administration.
Strong AIX/Linux storage: multipathing, SAN/NAS integration, filesystem tuning, I/O optimization.
High availability: PowerHA, Pacemaker and Corosync, clustering, quorum, failover and runbook validation.
Security automation: SSH, sudo, PAM, audit frameworks, configuration enforcement.
Deep performance analysis: CPU, memory, I/O, and network bottlenecks with advanced OS diagnostics.
Familiarity with container platforms (RHEL OpenShift, Kubernetes) and GitOps patterns as the Linux estate evolves is a plus. Experience with enterprise-approved AI coding assistants and structured log analysis tooling in regulated environments is also valued.

Benefit packages for this role will start on the 1st day of employment and include medical, dental, and vision insurance, as well as HSA, FSA, and DCFSA account options, and 401k retirement account access with employer matching. Employees in this role are also entitled to paid sick leave and/or other paid time off as provided by applicable law.