Senior System Engineer (L3 -Solaris / Linux )

About

Dice is the leading career destination for tech experts at every stage of their careers. Our client, IT Associates, Inc., is seeking the following.

Role

We are seeking an experienced L3 Systems Engineer with expertise in both Oracle Solaris and Linux (RHEL/CentOS) to support mission-critical financial applications. You will serve as the highest escalation point for complex platform issues, drive performance optimization, and lead automation initiatives.

Key Responsibilities

• Serve as L3 escalation point for complex Solaris and Linux infrastructure issues
• Perform deep-dive root cause analysis (RCA) for system failures and performance issues
• Lead performance tuning and capacity planning for critical systems
• Administer and maintain Oracle Solaris 10/11 environments and RHEL/CentOS
• Develop automation scripts (Shell, Python, Ansible) for provisioning, monitoring, and maintenance
• Manage Solaris Zones, LDOMs, and Linux virtualization (KVM/VMware)
• Configure and manage ZFS, LVM, VxFS file systems
• Execute system patching, upgrades, and security hardening
• Participate in Major Incident bridges and coordinate with vendors (Oracle, Red Hat)
• Mentor L1/L2 engineers and conduct knowledge transfer sessions
• Create and maintain technical documentation, SOPs, and runbooks

Required Skills

Solaris (Oracle Solaris 10/11):

• Expert in Solaris administration, SMF, and ZFS
• Strong experience with Solaris Zones, LDOMs
• Proficient in performance analysis (DTrace, mdb, prstat)

Linux (RHEL/CentOS):

• Expert in RHEL 7/8/9 administration, kernel tuning, and troubleshooting
• Strong experience with LVM, ext4, XFS, NFS, systemd
• Proficient in performance analysis (sar, vmstat, iostat, strace)

Common:

• Expert Shell scripting (Bash/Ksh); proficient in Python
• Experience with Ansible or similar automation tools
• Strong networking skills (TCP/IP, DNS, NFS, NIS)
• Experience with enterprise monitoring tools (Splunk, Grafana, Nagios)
• Solid understanding of ITSM processes (Incident, Problem, Change)

Preferred Qualifications

• RHCE or RHCSA certification
• Oracle Certified Professional – Solaris
• Experience with clustering (Solaris Cluster, Veritas, Pacemaker)
• Experience with SAN/NAS storage and enterprise backup solutions
• Banking or financial services domain experience
• ITIL Foundation certification

Education

• Bachelor’s degree in computer science, Information Technology, or equivalent

Working Conditions

• Location: Irvine, California (Hybrid)
• On-Call: Participation in 24x7 on-call rotation for critical escalations