Senior Tenable & Linux Security Administrator

G2IT, LLC.; Suitland (MD); On-site; USD 110,000 - 150,000; Full time

Job summary

G2IT, LLC. is seeking an experienced Tenable Administrator (Level 3) to support enterprise vulnerability management and cybersecurity operations within a DoD environment.

The role requires hands-on work with Tenable SecurityCenter, Nessus, RHEL, and related scanning solutions. Responsibilities include configuring and maintaining scans, hardening Linux with STIGs, and supporting cloud and virtualization platforms (VMware, AWS, Azure).

Qualifications

• Active TS clearance required with eligibility for TS/SCI access.
• 5–7 years in information systems focusing on application administration.
• 3–5 years installing and administering Tenable SecurityCenter, Nessus, and related components.
• 3–5 years managing recurring scans using Tenable.
• 3–5 years of administration in RHEL environments.
• Expertise deploying Tenable SecurityCenter in an enterprise environment.
• Strong experience with RHEL and multiple releases.
• Developing, testing, and deploying enterprise scan policies.
• Experience hardening Linux using STIGs.
• Familiarity with VMware and cloud environments (AWS/Azure).
• Knowledge of PKI and secure communications.
• Excellent written and verbal communication skills.

Responsibilities

• Install, configure, administer, maintain, and troubleshoot Tenable SecurityCenter and Nessus environments.
• Develop and deploy enterprise vulnerability, compliance, and discovery scan policies.
• Schedule and maintain recurring vulnerability and compliance scans.
• Administer applications within RHEL environments.
• Develop and troubleshoot Linux shell scripts for admin tasks.
• Monitor and optimize Tenable infrastructure for availability and security.
• Support vulnerability identification, assessment, reporting, and remediation.
• Apply STIGs to harden Linux systems.
• Support servers in VMware, AWS, Azure, and other clouds.
• Support PKI requirements and secure system communications.
• Troubleshoot Tenable, Nessus, Linux, network, and app issues.
• Maintain technical docs and scan policies and records.
• Communicate findings effectively to teams and leadership.

Skills

TS/SCI eligibility

Active TS clearance

Tenable SecurityCenter

Nessus Scanner

RHEL administration

VMware/AWS/Azure

PKI

Shell scripting

STIGs hardening

Strong communication

Education

Linux OS Administrator Certification

Tools

Tenable SecurityCenter

Nessus Scanner

RHEL

VMware

AWS

Azure

Job description

G2IT, LLC. is seeking an experienced Tenable Administrator (Level 3) to support enterprise vulnerability management and cybersecurity operations within a DoD environment.

The role requires hands-on work with Tenable SecurityCenter, Nessus, RHEL, and related scanning solutions. Responsibilities include configuring and maintaining scans, hardening Linux with STIGs, and supporting cloud and virtualization platforms (VMware, AWS, Azure).