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SYSTEM ADMINISTRATOR NessusTrellix 5+ yrs of Experience TSSCI wPoly clearance is required ES 081426-1


Job Location:

Fort Meade, MD - USA

Monthly Salary: K 151 - 160
Experience Required: 10-15years
Posted: 2 September 2026 (15 days ago)
Application Deadline: 30 November 2026
Vacancies: 1 Vacancy

Job Summary

System Administrator - Nessus/Trellix - 5 yrs of Experience - TS/SCI w/Poly Required

Halogen Engineering is looking for a Records Management Systems Administrator who will be part of a team and will provide support required to operate and maintain all hardware and software in compliance with established policies required by the customer. This position is technical in nature. The successful individual will perform systems administration in coordination with the ISSO. The Systems Administrator will:

Location: Fort Meade MD
Travel Required: No
Shift: Day
Remote Type: Onsite
Security Clearance: Current TS/SCI
Polygraph: Required


Salary Range


The projected compensation range for this position is 151K- 160K (annualized USD).

Salary is determined by various factors including but not limited to location the individuals particular combination of education knowledge skills competencies and experience as well as contract-specific affordability and organizational requirements


Capabilities
  • Provide tier 1 helpdesk support at an annual exercise event
  • Collect and transfer files between networks
  • Manage user accounts
  • Apply and verify patches on Windows and Linux systems
  • Update Trellix ePO (Formerly McAfee) security files
  • Run and review vulnerability scans and compliance scans
  • Manage configuration control of IT assets
  • Coordinate with event locations to ensure access


Requirements

Required Skills

Bachelors degree in a technical discipline from an accredited college or university and five (5) years experience as a SA in programs and contracts of similar scope type and complexity is required. Five (5) years of additional SA experience may be substituted for a bachelors degree.

Must have at least two (2) years of demonstrated experience in Modern operating systems and network architectures.

Must have at least two (2) years of demonstrated experience in certification and accreditation. Architecture development and design. Risk Assessments. IA Metrics gathering.

Must meet DoD Directive 8570 IAM Level 1 requirements (Security at a minimum).

Be willing to operate in a dynamic environment with minimal supervision and possess strong interpersonal problem solving and decision- making skills.

Be willing to travel; several smaller trips (2-5 days) per year and one longer trip (2 to 5 weeks) per year.

Physical Demands & Equipment: Must be able to lift up to 25 lbs.

Experience with Tenable Nessus/ACAS.

Experience with Trellix (formerly McAfee).

Understanding of DNS.

Familiarity with Linux CLI; Windows Servers; Bash and Powershell Scripting.

Experience with Nginx and Apache Web Server Management.

Understanding of basic networking concepts.

Desired Skills
  • Experience with PKI; Ansible or other operating tools; Linux KVM Hypervisor; Windows GPO; Elasticsearch/Kibana; GIT; Python; RSYSLOG; Nxlog; Cisco IOS CLI
  • Demonstrate experience with Operating Systems (Windows Linux).


Benefits


CareFirst Insurance

Medical Plans

  • Three available medical plans2 Platinum PPO Plans ($0 Deductible) and 1 HSA Plan ($1500 deductible)
  • Halogen pays 100% Medical Premium Costs up to $25000
  • CareFirst Wellness Rewards Program
Guardian Insurance

Dental Plan

  • Halogen pays 50% of the plan costs

Vision Plan

  • Halogen pays 100% of the plan costs

401K Retirement Plan

10% contribution paid by the company automatically vested and paid in each pay period.

Life Insurance AD&D Short and Long Term Disability Coverage

Paid Time Off

20 Paid Time Off Days

6 Federal Holidays

5 Floating Holidays

Bonuses

Based on performance and billable hours


Halogen Engineering Group does not discriminate in employment on the basis of race color religion sex (including pregnancy and gender identity) national origin political affiliation sexual orientation marital status disability genetic information age membership in an employee organization retaliation parental status military service or other non-merit factor.





Required Skills:

Required Skills Applies systems engineering principles throughout the systems life cycle phases: Concept Development Production Utilization Support and Retirement. Interacts with the Government regarding Systems Engineering technical considerations and for associated problems issues or conflicts. Communicates with other program personnel government overseers and senior executives. Responsibility for the technical integrity quality and completeness of work performed and deliverables associated with one or more of the 25 process areas defined by ISO/IEC15288: Technical Process Area - Stakeholder Requirements Definition Requirements Analysis Architectural Design Implementation Integration Verification Transition Validation Operation Maintenance and Disposal; Project Process Area - Project Planning Project Assessment and Control Decision Management Risk Management Configuration Management Information Management and Measurement; Enterprise (Organizational Project-Enabling) Process Area - Project Portfolio Management Infrastructure Management Lifecycle Model Management Human Resource Management and Quality Management; Agreement Process Area - Acquisition and Supply. A Bachelors degree in a Qualified Engineering Field (See Note 1) or a related discipline (See Note 2) from an accredited college or university plus six (6) years of systems engineering experience OR A High School Diploma or GED plus ten (10) years of general system engineering experience (any Process Area). OR A Masters degree in a Qualified Engineering Field (See Note 1) or a related discipline (See Note 2) from an accredited college or university plus four (4) years of systems engineering experience OR A PhD in a Qualified Engineering Field (See Note 1) or a related discipline (See Note 2) from an accredited college or university plus four (4) years of systems engineering experience. Examples of Qualified engineering fields include: Aeronautics Biomedical Chemical Civil Computer Electrical Environmental Mechanical Nuclear Software Systems and Engineering Management. Examples of related disciplines include: Chemistry Computer Science Information Systems Mathematics and Physics