Demo

Information System Security Engineer

Select Search Associates LLC
Fairfax, VA Full Time
POSTED ON 5/8/2026
AVAILABLE BEFORE 7/7/2026
Information System Security Engineer 
Active TS/SCI w/CI Poly Clearance is Required
 
Job Description: Seeking an Information System Security Engineer (ISSE). The role of the ISSE is to bridge the gap between high level security policies/requirements and technical/operational implementation of those requirements. Candidates should have in-depth understanding of the cybersecurity policies and procedures for Government (DoD, Intelligence Community) sectors information systems and sufficient technical knowledge and experience to implement them. The ISSE will work closely and effectively with the Information System Security Manager (ISSM) ISSM, and the Program Manger on all aspects of their development and implementation programs. Candidates should have in-depth understanding of the cybersecurity policies and procedures for Government sector information systems and sufficient technical knowledge and experience to implement them.  
The ISSE will provide guidance, standards, and oversight to the program/development teams as they work towards accreditation and then to maintain the accreditation. The candidate will contribute to the team’s successful Assessment and Authorization (A&A) process activities (ICD-503 RMF) and related documentation such as security concept of operations, systems security plans, security control assessments, contingency plans, configuration management plans, incident response plans, plan of actions and milestones, risk management plans, vulnerability and compliance scanning, and/or vulnerability management plans. 
The ISSE will be an experienced System Administrator and Cyber Security Expert. The candidate will be supporting a larger team of developers, engineers, and analysts all charged with expanding, operating, and maintaining information systems built upon hundreds of Linux instances on virtual and bare metal hardware. Team responsibilities include Linux system build automation, network architecture and implementation, all facets of cyber security compliance, deployment and management of core subsystems and services. The ISSE will assume responsibility for ICD-503 RMF process for these multiple information systems including patching, scans, reports, documentation, coordinating plans of actions and milestones, audit log reviews and other related duties.
The ISSE will help determine and recommend appropriate solutions and implementations to help meet program needs.   Candidate must possess the ability to communicate effectively and be flexible, adaptable, and willing to take ownership of projects. 
Candidate will have several technical areas of primary responsibility depending on experience and will be expected to cross train and support other areas as needed. Superior attention to detail is required. Must exhibit positive attitude and good customer service skills in sometimes stressful situations, such as during outage troubleshooting and resolution.
Required Skills:
  • Active TS/SCI CI Poly
  • Information Assurance (IA) and Information Security (InfoSec) experience working with Intelligence Community (IC) customers, which includes developing and reviewing security concept of operations, systems security plans, security control assessments, contingency plans, configuration management plans, incident response plans, plan of actions and milestones, risk management plans, vulnerability and compliance scanning, and/or vulnerability management plans. Must have significant expertise in ICD503 A&A process and documentation preparation.
  • Security engineering experience; which includes systems engineering principles, configuration management, supply chain, requirements analysis, system development (software and hardware); network security architecture concepts (topology, protocols, components); and/or IT security principles and methods (firewalls, demilitarized zones, encryption).
  • Required experience with ICD-503 security frameworks to include A&A process and documentation preparation. Also desired is experience in NIST SP 800-37, CNSS publications, and other Risk Management Framework (RMF) processes.
  • Experience providing continuous monitoring support for information systems to include expertise in
USG security compliance processes, scan tools and systems (NESSUS, NMAP, Trivy, ICD-503 RMF, SNOW) 
  • Advanced problem solving skills: able to use prior experience and knowledge to address new situations; especially during interactions with clients.
  • Experience providing assistance to A&A test and evaluation activities. 
  • Proficiency with Red Hat Linux/Unix and Kubernetes environments to include Red Hat Certified System
Engineer (RHCSE) or equivalent skills. 5 years’ experience as Linux system engineer/admin       Working knowledge of various Cross Domain Service (CDS) technologies and implementations.
  • Demonstrated advanced analytical skills: able to use prior experience and knowledge to seamlessly incorporate new knowledge or information during client interactions.
  • Demonstrated ability to work seamlessly with the program and development team to be able to communicate security practices from the development requirements
  • Be able to evaluate proposed security architectures and designs and provide input as to the adequacy of those security designs to meet required security compliance objectives         Security certification (Security or CISSP)
Desired Skills:
  • Current or former Cisco Certified Network Associate (CCNA) and CCNA Security or equivalent skills and experience 
  • Proficient, efficient, and confident in writing and deploying Linux/UNIX scripts for system administration and file management
  • Experience with Puppet, and/or Ansible 
  • Experience with SNOW and ServiceNow
  • Experience configuring, securing, managing and troubleshooting Linux/Unix systems
  • Familiar with source code control tools such as: git, gitlab, cvs, svn
  • Experience with log aggregation tools used for audit log purposes from all sources, including Linux,
Networking equipment, and applications
  • Experience with public key infrastructure (PKI), secure shell (ssh) configuration and troubleshooting, sssd, httpd
  • Experience with Amazon Web Services or other cloud technologies
  • Experience deploying enterprise monitoring tools such as Grafana
  • Experience with VMware
  • Experience with relational database technologies such as Oracle and MySQL
  • Advanced writing skills: able to clearly articulate ideas for executive level as well as technical staff consumption
Education and Experience:
  • Bachelor’s Degree in Computer Science, Information Technology, related field, plus 10 years of experience is desired.
 

Salary.com Estimation for Information System Security Engineer in Fairfax, VA
$136,312 to $164,228
If your compensation planning software is too rigid to deploy winning incentive strategies, it’s time to find an adaptable solution. Compensation Planning
Enhance your organization's compensation strategy with salary data sets that HR and team managers can use to pay your staff right. Surveys & Data Sets

What is the career path for a Information System Security Engineer?

Sign up to receive alerts about other jobs on the Information System Security Engineer career path by checking the boxes next to the positions that interest you.
Income Estimation: 
$123,167 - $152,295
Income Estimation: 
$146,673 - $180,130
Income Estimation: 
$111,725 - $147,313
Income Estimation: 
$139,945 - $168,577
Income Estimation: 
$140,233 - $181,029
Income Estimation: 
$161,209 - $233,553
Employees: Get a Salary Increase
View Core, Job Family, and Industry Job Skills and Competency Data for more than 15,000 Job Titles Skills Library

Job openings at Select Search Associates LLC

  • Select Search Associates LLC Manassas, VA
  • Our client has an immediate need for a TIER 3 NOC NETWORK ENGINEER to work full-time on-site at their client location in LORTON, VA . This position require... more
  • 4 Days Ago

  • Select Search Associates LLC Springfield, VA
  • SSA LLC has a need for a DevOps Engineer to support a Federal Program in Springfield, VA. This is a direct-hire role with our client, a fast-growing Federa... more
  • 5 Days Ago

  • Select Search Associates LLC Alexandria, VA
  • Position Summary One of our large federal government contracting clients has an upcoming need for a Quality Control Manager for a 6 - 7 month project in Al... more
  • 5 Days Ago

  • Select Search Associates LLC Fairfax, VA
  • Linux Enterprise System Administrator Our systems administration team seeks a strong Linux enterprise systems administrator whose primary responsibility wi... more
  • 5 Days Ago


Not the job you're looking for? Here are some other Information System Security Engineer jobs in the Fairfax, VA area that may be a better fit.

  • Guidehouse and Careers Washington, DC
  • Job Family: Cyber Consulting Travel Required: Up to 10% Clearance Required: Ability to Obtain Public Trust What You Will Do: System Boundary Analysis: Defi... more
  • 4 Days Ago

  • Cymertek Chantilly, VA
  • Information System Security Engineer LOCATION Chantilly, VA 20151 CLEARANCE TS/SCI Full Poly (Please note this position requires full U.S. Citizenship) KEY... more
  • 5 Days Ago

AI Assistant is available now!

Feel free to start your new journey!