L3 Systems Engineer

Title: L3 Systems Engineer with expertise in both Linux (RHEL/CentOS) and Oracle Solaris
Location: Irvine California. (Hybrid)
Standard working hours are 9:00 a.m.-6:00 p.m. Pacific Time.

We are seeking an experienced L3 Systems Engineerwith expertise in both Linux (RHEL/CentOS) and Oracle Solaris 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.

We want all new Associates to succeed in their roles at Ensono. Thats why weve outlined the job requirements below. To be considered for this role its important that you meet all the required qualifications. If you do not meet all of the Preferred Qualifications we still encourage you to apply.

Key Responsibilities

Serve as L3 escalation point for complex Linux and Solaris 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 RHEL/CentOS and Oracle Solaris 10/11 environments

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

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)

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)

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

Bachelors degree in computer science Information Technology or equivalent