Senior ForeScout Engineer - Active TS/SCI with CI Poly

ENS Solutions, LLC; Reston (VA); On-site; USD 130,000 - 180,000; Full time

Benefits offered by this job

Free Platinum Medical/Dental/Vision

401k from day 1

PTO + 11 paid federal holidays

Disability insurance

Group term life

Tuition and certification assistance

Relocation assistance

Job summary

ENS Solutions, LLC seeks a senior security professional to implement and operate next-generation cyber defense for government and commercial clients. You will lead a team, evaluate advanced tools, and develop effective countermeasures across large networks.

The role requires hands-on security engineering, strong AD and network design skills, and the ability to work with senior management while mentoring teammates. On-site in Reston, VA with DoD-related responsibilities.

Qualifications

• 7+ years of systems administration experience (Windows or Linux).
• Experience deploying or maintaining ForeScout CounterACT appliances.
• Experience architecting and designing IP networks and documenting topologies.
• Experience with network engineering including switches, LANs, VLANs, firewalls, and AD/domain management.
• Knowledge of multidomain architectures (data center, WAN, LAN) in virtualized environments.
• Active TS/SCI clearance; willing to take a polygraph.
• DoD 8570 IAT Level III Certification within 30 days of start date.
• DoD 8570 Cybersecurity Service Provider - Infrastructure Support Certification within 30 days of start date.

Responsibilities

• Develop and operate next generation security solutions for government and commercial clients.
• Lead a team to engineer security solutions for complex challenges.
• Evaluate, implement, and operate cyber defense tools and technologies.
• Identify vulnerabilities and threats and develop countermeasures.

Skills

Systems administration

Network engineering

Active Directory

Multidomain architectures

Communication with senior management

Security event analysis

Mentoring

Education

Bachelor’s degree

Associate’s degree + 10+ years experience

Master’s degree + 6+ years experience

Tools

ForeScout CounterACT

DoD 8570 IAT Level III Certifications

Security frameworks knowledge

Job description

In this role, 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 of 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.

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.
• Leverage big data analytics and traditional security event types to identify advanced threats or indicators of compromise.

• 7+ 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 architecting and designing IP networks, including developing and documenting network topologies
• 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 multidomain architectures, including data center, WAN, and LAN, in virtualized architectures
• Active TS/SCI clearance; willingness to take a polygraph exam
• Associate’s degree and 10+ years of experience supporting IT projects and activities, Bachelor’s degree and 8+ years of experience supporting IT projects and activities, or Master’s degree and 6+ years of experience supporting IT projects and activities
• Ability to obtain a DoD 8570 IAT Level III Certification, such as SecurityX, CCNP Security, CISA, CISSP, GCED, GCIH, or CCSP Certification, within 30 days of start date
• Ability to obtain a DoD 8570 Cybersecurity Service Provider - Infrastructure Support Certification such as CEH, CySA+, GICSP, SSCP, CHFI, CFR, Cloud+, or CND Certification, within 30 days of start date

Nice If You Have:

• Knowledge of federal information security policies, standards, procedures, directives, frameworks, federal security authorizations, assessment, and risk management processes for enterprise systems
• Abilityto installand deploy ForeScout in a multidomain customer environment
• Ability tointegrate 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 coordinating efforts and establishing customer relations
• ForeScout Certified Administrator (FSCA) or ForeScout Certified Engineer (FSCE) Certification

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.