Sr. Unix Systems Administrator

Responsibilities

• Configure, maintain, manage, and troubleshoot Unix-based OS operating environments and associated components such as the Unix file system and Domain Name System (DNS).
• Configure and sustain operating environments aligning with DISA specifications as related to specific network and storage components and tool suites.
• Install, configure, administer, and support secure remote access utilities and applications including Secure Shell, Secure Web Access, Virtualization (HyperVisor, VMWare, etc.), Apache Tomcat, Apache HTTP Server, and Remote X server access.
• Proactively monitor operating environments using Enterprise Systems Management toolsets to identify and correct server performance issues.
• Manage clustering at the OS level using clustering software (e.g., Solaris Cluster, Linux clustering, etc.).
• Utilize Unix scripting (Ansible, Bash, Bourne, Korn, Perl, etc.) to optimize and automate system administration tasks.
• Perform backup and recovery functions for Unix server environments.
• Implement and sustain LDAP protocol solutions, to include policy management and compliance with hardening guidance in DISA STIGs.
• Leverage DISA security tools (ACAS, Splunk, HBSS, Trellix, Enterprise Security Posture System (ESPS), etc.) to monitor and mitigate vulnerabilities and ensure compliance with security policies.
• Manage all assigned tickets (incident, problem, change, service requests, etc.) in accordance with DISA policies and SLAs.
• Attend meetings, participate in conference calls, and respond to email/ticket requests to ensure support is provided.

Qualifications

• Must have a minimum of five (5) years of relevant Unix Server System Administration experience.
• Must have an IAT Level II certification (e.g., Security+ CE, SSCP, CYSA+, GICSP, GSEC or CCNA Security) and 50 credits of continuing education every 3 years.
• Must have a Unix-based Operating System certification (e.g., RHCSA, RHCE, RHCA, CompTIA Linux+, GIAC Certified Unix Security Administrator, Oracle Solaris System Administrator Certified Professional, etc.).
• Must have a fully adjudicated (non-interim) DoD Secret Clearance in order to be able to access and provide SIPRNET support at a DISA location.