FULL_TIME

FEED

UNKNOWN

RISA is hiring a senior Endpoint Security Engineer to install, run, and tune the Tenable Suite (Security Center, Nessus Scanners, and Nessus Managers) on Linux across a large, global network supporting an Intelligence Community customer. Rolston Information Systems Assurance (RISA) is a Service-Disabled Veteran-Owned Small Business that has supported federal defense and intelligence cybersecurity missions for more than seventeen years.

YEAR

RISA

Vulnerability Management Engineer (Tenable/Nessus, Linux)

Talent Acquisition

Bachelor’s Degree in related technical discipline OR equivalent work experience in lieu of degree • Minimum of 5+ years supporting mission networks • Minimum of 7+ years of current experience supporting Microsoft Windows environments, including administration (Active Directory) and the management of group policy security configurations • Experience with troubleshooting domain connectivity and performance issues • Experience working with network monitoring tools such as SolarWinds Orion • Significant experience with PowerShell, Ansible or Terraform/Packer for automation and scripted deployment of Windows resources, to include servers and workstations • Window Server Update Services (WSUS) knowledge and hands on expertise across various disconnected enclave environments • Significant experience with VMware technologies, to include recent releases of vSphere, VSAN, Horizon View Virtual Desktop Infrastructure • Working knowledge and/or understanding of cloud computing concepts • Excellent interpersonal and communications skills needed to work in a small team dynamic and with mission partners, operational elements, other engineers and vendors • Quick learner, detail oriented and strong ownership of work product • Able to prioritize in a fast moving, high pressure, constantly changing environment that might be lacking documentation or the exact steps to troubleshoot • Strong communication and presentation skills to convey complex technical concepts to both technical and non-technical audiences Desired Requirements: • Certification or equivalent experience to include, Microsoft Certified Solutions Expert (MCSE). Responsibilities: Responsibilities: • Analyze customer requirements and provide solutions to a variety of technical problems of varying degrees of complexity • Perform maintenance and upgrade of the following computing environments: Windows Server 2022 and newer, Windows 11 • Must be well experienced with Active Directory, DNS, DHCP and IIS • Heavy emphasis on PowerShell scripting and configuration management through automation such as Ansible and Terraform/Packer • Responsibility for engineering designs, development and implementation of domain policies, hardening and related procedures related to core infrastructure • Responsible for performance and availability, providing appropriate access controls, hardware and software installation, as well as configuration and maintenance of all Windows-related technologies • Perform Tier III analysis and troubleshooting of networked servers and workstations, LAN-based connectivity, security services and related infrastructure • Maintain current knowledge and documentation of relevant technology • Provide end-user support and issue resolution, as necessary form Tier I escalation • Ability to effectively communicate issues and resolutions to all levels of the organization.

Senior Systems Engineer

[AW]-iCims

This position requires as seasoned, Tier II/Tier II systems engineer performing a wide variety of duties including installations, debugging, maintenance, upgrades, and general support of a niche network including both Linux and Windows environments. Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications.

CACI provides information solutions and services in support of national security missions and government transformation for Intelligence, Defense, and Federal Civilian customers. A member of the Fortune 1000 Largest Companies, the Russell 2000 Index, and the S&amp;P SmallCap 600 Index, CACI provides dynamic careers for over 15,800 employees working in over 120 offices worldwide. Visit <a href="http://www.caci.com" target="_blank" itemprop="url" mns_rt="Company">www.caci.com</a>. 
 
 We strive to sustain a corporate culture based on integrity - one that's focused on treating customers ethically and making their priorities our priorities. We pride ourselves in finding and hiring people with the highest intellectual capital, and providing them with challenging opportunities and encouraging their innovation and initiative.

CACI

Mission Systems Engineer

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Family-friendly benefits, including weeks off for Maternity leave, weeks off for non-birthing parent leave, employer-paid short-term and long-term disability, employer-paid life insurance, and access to additional life insurance, hospital coverage, accidental coverage, discounted mental health support, and more. Build trusted working relationships with client developers, DevOps engineers, architects, and engineering leadership; become the person they bring problems to before decisions get made.

Echelon Risk + Cyber Inc

Senior DevSecOps Engineer (Azure Experience) - Remote (USA)

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Zp Group Llc

Tier 3 Network Engineer (Top Secret)

As a member of our team, you will be responsible for the design, development, integration, and test of communications and network software, including protocol implementation, network services, and distributed systems for the Government across numerous departments and agencies. Architect, develop, integrate, and test software-based command and control, secure communication, and networking systems in operationally-realistic environments, working closely with sponsors to ensure mission success.

Johns Hopkins University Applied Physics Laboratory LLC

Network Software Engineer

You will serve as the technical authority for secure routed and switched campus networks, cross-domain enclaves, DISA circuits, and tactical-to-strategic integration, ensuring strict alignment with DISA STIGs and NIST cybersecurity controls. Compliance & Hardening: Practical experience using SCAP tools, Nessus/ACAS scanning reports, and STIG Viewer to remediate network findings.

Resource Management Concepts, Inc.

Senior Network Engineer

Workable

What you will bring: Bachelor’s degree in Computer Science, Information Technology, Network Engineering, or related STEM field with 5+ years of progressive network engineering experience; OR Equivalent combination of formal military technical training, specialized certifications, and practical experience in lieu of a degree. The position serves as a key technical leader, acting as the primary alternate to the Team Lead while supporting enterprise routing, switching, transport systems, encryption devices, cybersecurity compliance, modernization efforts, and operational continuity.

JCS Solutions LLC

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Conducts detailed engineering evaluations of routing/switching architectures, physical/virtual tools, and deployment methodologies while leading automated network readiness verification, requirement traceability matrices, and validation testing to guarantee line-rate performance and seamless interoperability. Responsibilities: Engineers, validates, and optimizes end-to-end network architecture across the entire system lifecycle, directing technical requirements gathering, high-level/low-level design (HLD/LLD), implementation documentation, and system integration.

Govcio LLC

Network Engineer

Pay Range: There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. You will work closely with technical teams and customers to strengthen cybersecurity capabilities, automate workflows, and ensure secure, reliable operations across the enterprise.

CACI International Inc

Senior Cyber Security Engineer

The Network Engineer will work as part of a collaborative, multidisciplinary team providing technical subject matter expertise in network engineering, telecommunications, and communications modeling. This position will design, integrate, deploy, and support secure enterprise and field communications environments encompassing voice, video, data, LAN/WAN, RF communications, and other network technologies.

Markon Solutions

Expert Network Engineer

Markon

Our team provides continuous monitoring, threat detection, incident response, and vulnerability management across cloud and on-premises environments, including AWS, Azure, GCP, Oracle Cloud, and SaaS platforms. August 13, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Everything we do is built on our commitment to do the right thing for our customers, our employees, and our communities. Learn more about the values and culture that are the foundations of our business.

Leidos

Data Security Engineer

Job Title: Senior Network Operations Engineer – Tier 3Job Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: TS/SCI with PolygraphEmployee Type: RegularPercentage of Travel Required: Up to 25%Type of Travel: Continental US* * * The Opportunity: Working closely with the NOC, NetOps Tier 2, and fellow NetOps Tier 3 technicians, you will execute break/fix activities, implement configuration changes, and diagnose routing and switching issues across the network environment.

Senior Network Operations Engineer – Tier 3

Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. Performs risk assessment, risk mitigation analysis, vendor trade studies, and appropriate documentation to ensure network services are available according to established Service Level Agreements (SLA).

SAIC is a premier Fortune 500® technology integrator driving our nation's digital transformation. Our robust portfolio of offerings across the defense, space, civilian, and intelligence markets includes secure high-end solutions in engineering, IT modernization, and mission solutions. Using our expertise and understanding of existing and emerging technologies, we integrate the best components from our own portfolio and our partner ecosystem to deliver innovative, effective, and efficient solutions that are critical to achieving our customers' missions.

We are a team of 26,000 strong driven by mission, united purpose, and inspired by opportunity. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.1 billion. For more information, visit saic.com.

Leidos Holdings Inc

Principal Network Engineer

Through a dedicated focus on key business priorities and intentionally creating a rewarding employee experience, Sikich has developed into a highly regarded provider of professional services and a sought-after employer of choice. Work within Azure and the data center, collaborating with other engineers to develop strategies and plans in support of migration efforts and maintaining networking across a hybrid environment.

Sikich LLP

Network Engineer (Gov''t Tech)

Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. This individual performs risk assessment, risk mitigation analysis, vendor trade studies, and appropriate documentation to ensure network services are available according to established Service Level Agreements (SLA).

Network Engineer (SME)

Impactful Work: Your contributions will be pivotal in designing, deploying, and securing mission-critical network infrastructure supporting national security operations. Bachelor's degree in Computer Science, Information Technology, Engineering, or related field and 6+ years of experience; additional experience may be substituted for a degree.

When you become part of the When you become part of the KBR team, your opportunities are endless. As a leading global technology, engineering, procurement and construction company serving the hydrocarbons and government services industries. For decades it has been the company that customers turn to for their most challenging assignments.
 
With operations in 40 countries, KBR has more than 25,000 people delivering services to customers in over 70 countries. Together they represent an unmatched reservoir of talent and experience in a wide range of markets.
 
Whatever the assignment, no matter how complex or demanding, KBR can marshal resources across every product line to respond quickly and effectively to changing markets and customer needs.
 
Whether it's providing the technology and consulting know-how to develop our customers' valuable assets; designing and constructing the infrastructure and facilities to develop energy resources in some of the world's more remote and challenging locations; providing support and services for men and women of their countries' armed forces; or navigating the intricacies of undertaking major projects in geopolitically or culturally sensitive environments, our clients depend on KBR because they know that We Deliver.
 
Join us and you'll be part of a dynamic, elite team of professionals who understand what it takes to get a job done and has the experience, knowledge and determination to succeed.”

KBR Inc

Role Description: Administer and support secure network environments, including routing, switching, firewalls, VPNs, DNS, and F5 BIG-IP technologies like LTM, APM, and ASM. Monitor performance, troubleshoot incidents, implement changes, and maintain network documentation in line with agency security policies and NIST requirements.

ARK SOLUTIONS, INC

Network Engineer/Administrator :: Washington, DC (Remote)

Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. You’ll lead onsite surveys, drive secure design development, oversee deployment execution, and ensure resilient, high‑availability connectivity that meets demanding SLAs.

Security Engineer Jobs in Chantilly, VA

Vulnerability Management Engineer (Tenable/Nessus, Linux) RISA

Senior Systems Engineer VTG

Mission Systems Engineer CACI

Senior DevSecOps Engineer (Azure Experience) - Remote (USA) Echelon Risk + Cyber Inc

Tier 3 Network Engineer (Top Secret) Zp Group Llc

Network Software Engineer Johns Hopkins University Applied Physics Laboratory LLC

Senior Network Engineer Resource Management Concepts, Inc.

Senior Network Engineer JCS Solutions LLC

Network Engineer Govcio LLC

Senior Cyber Security Engineer CACI International Inc

Expert Network Engineer Markon Solutions

Expert Network Engineer Markon

Data Security Engineer Leidos

Senior Network Operations Engineer – Tier 3 CACI

Principal Network Engineer Leidos Holdings Inc

Network Engineer (Gov''t Tech) Sikich LLP

Network Engineer (SME) Leidos Holdings Inc

Network Engineer KBR Inc

Network Engineer/Administrator :: Washington, DC (Remote) ARK SOLUTIONS, INC

Senior Network Engineer CACI

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