Vulnerability Assessment Analyst / Information Systems Security Engineer (ISSE)

Omniscius Consulting; Maryland; On-site; USD 100,000 - 140,000; Part time

Job summary

Omniscius Consulting seeks a Vulnerability Assessment Analyst / ISSE to support vulnerability management and continuous monitoring in a highly secure environment. The role emphasizes Tenable Security Center, Nessus/ACAS scanning, DISA STIG compliance, and Windows/Linux security.

The position is based at a contractor site in Annapolis Junction, Maryland, with a part-time evening and weekend schedule. Active TS/SCI clearance with Full Scope Polygraph is required.

Qualifications

• Active DoD 8570 IAT Level II requirements.
• CompTIA Security+ CE or CEH certifications.
• Training alone is not acceptable as a substitute for the required CE certification.

Responsibilities

• Maintain and optimize the Tenable Security Center infrastructure.
• Perform security assessments, patching, and vulnerability scans of Linux and Windows systems.
• Identify and mitigate DISA STIG findings and vulnerabilities across Tenable and Nessus scanning servers.
• Install, configure, maintain, and update Tenable Nessus and Tenable Security Center software.
• Configure and fine-tune vulnerability scanning policies and asset lists.
• Conduct recurring vulnerability assessments across multiple device types and operating systems.
• Use Nessus/ACAS to identify vulnerabilities across customer assets as part of continuous monitoring.
• Review Nessus/ACAS scan results and provide remediation guidance.
• Analyze vulnerability scan results and develop comprehensive reports.
• Monitor and track vulnerability remediation activities through completion.
• Coordinate with IS Security personnel and other teams to ensure timely remediation.
• Communicate security posture and risks to stakeholders.
• Maintain documentation related to vulnerabilities and security incidents.

Skills

Tenable Security Center

Nessus/ACAS

DISA STIGs

CIS Benchmarks

Linux/Unix

Windows administration

Networking

Patch deployment

System configuration

Education

Bachelor's Degree

High School Diploma/GED

Tools

ACAS

Job description

Location: Annapolis Junction, MD
Schedule: Part-Time – Evenings and Weekends
Clearance: Active TS/SCI with Full Scope Polygraph required

Position Overview

Our client is seeking a Vulnerability Assessment Analyst / Information Systems Security Engineer (ISSE) to support vulnerability management and continuous monitoring activities in a highly secure environment. The position will focus heavily on Tenable Security Center, Nessus/ACAS vulnerability scanning, DISA STIG compliance, vulnerability remediation, and Windows/Linux security.

The position is based at a contractor site in Annapolis Junction, Maryland, with a part-time evening and weekend schedule.

Responsibilities

• Maintain and optimize the Tenable Security Center infrastructure.
• Perform security assessments, patching, and vulnerability scans of Linux Security Center servers using Tenable Nessus.
• Identify and mitigate DISA STIG findings and vulnerabilities across Tenable Security Center and Windows/Linux Nessus scanning servers.
• Install, configure, maintain, and update Tenable Nessus and Tenable Security Center software.
• Configure and fine-tune vulnerability scanning policies and asset lists to ensure comprehensive coverage.
• Conduct recurring vulnerability assessments across multiple device types and operating systems.
• Use Nessus/ACAS to identify vulnerabilities across customer assets as part of continuous monitoring activities.
• Review and analyze Nessus/ACAS scan results and provide remediation guidance.
• Analyze vulnerability scan results and develop comprehensive reports.
• Monitor and track vulnerability remediation activities through completion.
• Coordinate with Information Systems Security personnel and other technical teams to ensure vulnerabilities are addressed in a timely manner.
• Communicate security posture, vulnerabilities, and potential risks to technical and management stakeholders.
• Maintain accurate documentation and records related to vulnerabilities and security incidents.

Required Qualifications

• Active TS/SCI clearance with Full Scope Polygraph.
• Hands‑on experience with enterprise vulnerability management and scanning solutions such as Tenable Security Center, Tenable Nessus, and/or ACAS.
• Familiarity with DISA STIGs, Tenable Audit Files, and/or CIS Benchmarks.
• Knowledge of system and application security threats and vulnerabilities.
• Working knowledge of:
  • Linux/Unix administration
  • Windows administration
  • Networking
  • Patch deployment
  • System configuration
• Ability to analyze vulnerability scan results and support remediation efforts.

Education & Experience

Candidates must meet one of the following combinations:

• High School Diploma/GED + 11 years of relevant experience, OR
• Bachelor's Degree + 7 years of relevant experience.

Certification Requirements

• Must meet DoD 8570 IAT Level II requirements.
• Acceptable certifications identified for the position include:
  • CompTIA Security+ CE
  • CEH

Training alone is not acceptable as a substitute for the required CE certification.

Preferred Qualifications

• In-depth knowledge of vulnerability assessment methodologies, tools, and industry best practices.
• Strong analytical and problem‑solving skills with excellent attention to detail.
• Self‑starter capable of owning technical tasks from beginning to end.
• Ability to work effectively both independently and as part of a technical team.
• Strong written and verbal communication skills for presenting vulnerability findings and security risks to stakeholders.

Security Requirements

Candidates must possess an active TS/SCI clearance with Full Scope Polygraph and be able to operate as a privileged user within the supported environment.