Senior Linux Systems Engineer - Mission-Critical Ops

Cornerstone Defense LLC; Annapolis (MD); On-site; USD 190,000 - 210,000; Full time

Benefits offered by this job

Medical, Dental and Vision Plans

Generous PTO Policy

401(k)

HSA and FSA options

Life and Disability Insurance

Tuition Reimbursement and Training

Perks at Work Discount Program

Referral Program

Leads Generation Program

CollegeAmerica 529

Fitness Reimbursement Program

Travel Assistance

Norton Lifelock Benefit Solutions

Life Planning Financial & Legal Serv

Job summary

Cornerstone Defense LLC seeks a Senior Linux System Administrator/System Engineer to sustain Linux-based systems in a high-visibility, mission-critical environment. The role demands expert-level administration, engineering, and collaboration across mission teams to ensure reliability and compliance.

Required: 10+ years Linux experience, CentOS/RHEL, JBoss/Wildfly, VMware, and scripting with Shell/Python. TS/SCI with polygraph is required to apply.

Qualifications

• 10+ years' experience administering and engineering solutions in Linux mission environments.
• Deep expertise with CentOS/RHEL environments and middleware (JBoss/Wildfly).
• Experience with virtualization (VMware) and automation (Ansible).

Responsibilities

• Provide expert-level administration, engineering, and sustainment of Linux-based systems across secure facilities.
• Collaborate across mission teams to maintain system reliability, availability, and compliance.
• Work independently in fast-paced, mission-oriented environments.

Skills

CentOS/RHEL administration

JBoss/Wildfly

VMware

Scripting (Shell, Python)

Red Hat Ansible

Security+

Storage administration

Networking fundamentals

LDAP/Kerberos authentication

Oracle Database administration

Education

Bachelor's degree or equivalent

Tools

JBoss/Wildfly

VMware

Oracle Database

Red Hat Ansible

Job description

Cornerstone Defense LLC seeks a Senior Linux System Administrator/System Engineer to sustain Linux-based systems in a high-visibility, mission-critical environment. The role demands expert-level administration, engineering, and collaboration across mission teams to ensure reliability and compliance.

Required: 10+ years Linux experience, CentOS/RHEL, JBoss/Wildfly, VMware, and scripting with Shell/Python. TS/SCI with polygraph is required to apply.