Jobs in the United States

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Added 2 hours ago
Senior ForeScout Engineer - Active TS/SCI with CI Poly
ENS Solutions, LLC
Reston, VA
Active TS/SCI clearance; willingness to take a polygraph exam
Added 2 hours ago
Senior ForeScout Engineer - Active TS/SCI with CI Poly
ENS Solutions, LLC
Washington, DC
Active TS/SCI clearance; willingness to take a polygraph exam
Added 2 hours ago
ForeScout Engineer - Active TS/SCI With CI Poly
ENS Solutions, LLC
Washington, DC
TS/SCI clearance with the ability to obtain a counter-intelligence polygraph.
Added 2 hours ago
ForeScout Engineer - Active TS/SCI With CI Poly
ENS Solutions, LLC
Reston, VA
TS/SCI clearance with the ability to obtain a counter-intelligence polygraph.
Added 2 days ago
Linux System Administrator
MANTECH
Laurel, MD
Must possess an active TS/SCI clearance with Polygraph.
Added 3 days ago
Systems Admin L3
Jovian Concepts, LLC
Annapolis Junction, MD
CLEARANCE REQUIREMENT: A current and active TS/SCI clearance with a Maryland (MD) polygraph is required for consideration. CCA candidates will not be considered for this position at this…
Added 4 days ago
Senior ForeScout Engineer - Active TS/SCI with CI Poly
ENS Solutions, LLC
Reston, VA · Washington, DC
Active TS/SCI clearance; willingness to take a polygraph exam
Added 4 days ago
ForeScout Engineer - Active TS/SCI With CI Poly
ENS Solutions, LLC
Washington, DC · Reston, VA
TS/SCI clearance with the ability to obtain a counter-intelligence polygraph.
Added 5 days ago
Systems Administrator
GD Information Technology, Inc.
United States
…configuration and reliable operation of computer systems, As a Systems Administrator, you will work closely with both on-site and remote users to coordinate site visits and upgrades,…
Added 7 days ago
Systems Administrator
Valiant Solutions, LLC
Fort Belvoir, VA
Required Clearance: TS/SCI with the ability to obtain and maintain a CI Polygraph.
Added 8 days ago
Senior Systems Administrator (Australia) - TS/SCI with Polygraph
GD Information Technology, Inc.
United States
General Dynamics Information Technology (GDIT) is seeking an IT Engineer with Microsoft Enterprise Systems Administrator experience to join our team in support of a Federal Intelligence…
Added 8 days ago
Senior Systems Administrator (Australia) - TS/SCI with Polygraph
GD Information Technology, Inc.
United States
General Dynamics Information Technology (GDIT) is seeking an IT Engineer with Microsoft Enterprise Systems Administrator experience to join our team in support of a Federal Intelligence…
Added 8 days ago
Systems Administrator
Arena Technical Resources, LLC
Fort Belvoir, VA
Eligibility/Clearance: Candidate must possess an active TS/SCI clearance
Added 10 days ago
Systems Administrator
GD Information Technology, Inc.
United States
…configuration and reliable operation of computer systems, As a Systems Administrator, you will work closely with both on-site and remote users to coordinate site visits and upgrades,…
Added 11 days ago
Linux System Administrator
MANTECH
Laurel, MD
Must possess an active TS/SCI clearance with Polygraph.
Added 11 days ago
System Administrator II
Reflexive Concepts
Fort Meade, MD
Reflexive Concepts is seeking a skilled Linux Systems Administrator to join our team!
Added 13 days ago
AWS Cloud Engineer
MANTECH
Annapolis Junction, MD
Provide Tier 2 administration, troubleshooting, and general support for Windows Server 2022 environments, Windows 10/11 client systems, and RHEL 8/9 / Linux distributions within cloud…
Added 13 days ago
Systems Admin L3
Jovian Concepts, LLC
Annapolis Junction, MD
CLEARANCE REQUIREMENT: A current and active TS/SCI clearance with a Maryland (MD) polygraph is required for consideration. CCA candidates will not be considered for this position at this…
Added 18 days ago
Windows Systems Administrator - McLean, VA - TS/SCI
PGTek, Inc
Ashburn, VA
Description Senior System Administrator (Windows) Location: McLean, VA (transitioning to Chantilly, VA) Clearance Required: Active TS/SCI with CI Polygraph Salary Range: $185,000 - $265,000…
Added 18 days ago
ForeScout Engineer
BOOZ, ALLEN & HAMILTON, INC.
Reston, VA
Active TS/SCI clearance; willingness to take a polygraph exam
Added 19 days ago
System Administrator I (Infrastructure and Sustainment)
Vibrint
Eagle Mountain, UT
Position requires an active TS/SCI with polygraph level clearance. US citizenship is required.
Added 20 days ago
Security Engineer / IT Help Desk Technician
Leidos
Bethesda, MD
…cost-effective solutions. The individual will work effectively with cross-functional teams to define technical requirements and identify and resolve technical design issues. This role will…
Added 20 days ago
Forescout Engineer
BOOZ, ALLEN & HAMILTON, INC.
Reston, VA
Active TS/SCI clearance; willingness to take a polygraph exam
Added 22 days ago
Windows Systems Administrator - McLean, VA - TS/SCI
PGTek, Inc
Ashburn, VA
Clearance Required: Active TS/SCI with CI Polygraph
Added 22 days ago
Tier 2 Systems Administrator
CACI International
Springfield, VA
Minimum Clearance Required to Start: TS/SCI with Polygraph

ENS Solutions, LLC

ForeScout Engineer - Active TS/SCI With CI Poly

Reston, VA, United States

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Job details

Posting language: English
Posted: Apr 14, 2026

Original job description

On our expert team, you’ll perform work focused on implementing and operating next generation security solutions for government and commercial clients. You’ll perform hands-on evaluation, implementation, and operation of leading security cyber defense tools and technologies, and apply in-depth defense strategies to large and complex networks to rapidly identify vulnerabilities and threats, prioritize response actions, and develop effective countermeasures. You’ll apply thought leadership in a highly collaborative and innovative work environment to solve complex security challenges. You will lead a team as they engineer solutions to complex challenges for customers using knowledge network engineering, Active Directory, and system administration.

In this role, you'll closely impact mission success, protecting data and networks from malicious payloads and actors. With mentoring, challenging hands-on problem-solving, and opportunities to learn new tools and skills, we focus on growing as a team to make the best solutions for our customers. Work with us as we secure and protect our nation's most sensitive capabilities.

What You’ll Work On:

Develop relationships quickly and easily with other teams, communicating the complexities of security with a wide variety of audiences, including senior management.
Manage infrastructure and cybersecurity controls, including enhanced detection and vulnerability capabilities and improved event correlation in large enterprises.
Contribute to risk and vulnerability assessments in network, system, and application areas, and leverage big data analytics and traditional security event types to identify advanced threats or indicators of compromise.
3+ years of experience performing systems administration for Windows or Linux, including performing basic troubleshooting and installation or configuration, monitoring system performance or availability, and performing security upgrades
Experience with the deployment or daily maintenance of ForeScout CounterACT appliances
Experience with network engineering, including physical or logical such as installation and activation of ports, configuration of switches, and LANS, VLANS, and network FW, or appliances or network administration services such as Active Directory, Guests LANS, and domain management
Knowledge of multi-domain architectures, including data center, WAN, and LAN in virtualized architectures
TS/SCI clearance with the ability to obtain a counter-intelligence polygraph.
HS diploma or GED and 7+ years of experience with supporting IT projects and activities, Associate’s degree and 5+ years of experience supporting IT projects and activities, Bachelor’s degree and 3+ years of experience supporting IT projects and activities, or Master’s degree and 1+ years of experience supporting IT projects and activities.
A DoD 8570 IAT Level III Certification such as SecurityX (formerly CASP+), CCNP Security, CISA, CISSP (or Associate), GCED, GCIH, CCSP certification within 30 days of start date
Ability to obtain a DoD 8570 Cybersecurity Service Provider - Infrastructure Support Certification (CSSP-IS), including CEH, CySA+, GICSP, SSCP, CHFI, CFR, Cloud+, or CND Certification, prior to start date on the contract.

Additional Qualifications:

ForeScout Certified Administrator (FSCA) and/or ForeScout Certified Engineer (FSCE) certifications
Knowledge of federal information security policies, standards, procedures, directives, frameworks, federal security authorizations, assessment, and risk management processes for enterprise systems
Ability to install and deploy ForeScout in a multidomain customer environment
Ability to integrate cybersecurity data using enterprise or custom tools data aggregation and analysis tools, including Splunk
Ability to provide support in a Tier II IT operations and maintenance role, including ticket work information updates, issue responses, and remediation
Ability to be a self-starter, work without considerable direction, and work with a team
Possession of excellent verbal and written communication skills, including for coordinating efforts and establishing customer relations

Essential Network Security (ENS) Solutions, LLC is a service-disabled veteran owned, highly regarded IT consulting and management firm. ENS consults for the Department of Defense (DoD) and Intelligence Community (IC) providing innovative solutions in the core competency area of Identity, Credential and Access Management (ICAM), Software Development, Cyber and Network Security, System Engineering, Program/Project Management, IT support, Solutions, and Services that yield enduring results. Our strong technical and management experts have been able to maintain a standard of excellence in their relationships while delivering innovative, scalable and collaborative infrastructure to our clients. Why ENS?

Free Platinum-Level Medical/Dental/Vision coverage, 100% paid for by ENS
401k Contribution from Day 1
PTO + 11 Paid Federal Holidays
Long & Short Term Disability Insurance
Group Term Life Insurance
Tuition, Certification & Professional Development Assistance
Workers’ Compensation
Relocation Assistance

Candidate AI Usage Policy AI tools are an important part of daily work at ENS Solutions, and we are committed to their responsible and ethical use. To ensure a fair and equitable candidate evaluation based on individual skills, knowledge, and experience, candidates are not permitted to use artificial intelligence or other assistive tools during interviews, whether in person or virtual, unless explicit permission has been granted in advance.

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