Security Architect

Leidos LLC; Reston (VA); Hybrid; USD 167,000 - 278,000; Full time

Job summary

Leidos in Reston, VA is seeking a Security Engineer Solution Architect to lead security across a primarily cloud-based platform for a Defense Intelligence Enterprise client. You will guide ATO processes, governance, and accreditation assurance while coordinating with cross-functional teams.

The role requires an active TS/SCI clearance with poly, strong DoD RMF experience, and expertise in CISSP or equivalent. Expect hybrid work with on-site collaboration in NCR/Reston locations.

Qualifications

• BS degree and 15+ years of prior relevant experience or Masters with 15+ years of prior relevant experience.
• Active TS/SCI clearance with ability to obtain/maintain a Polygraph.
• DoD 8570.01-M IASAE Level II certs: CISSP, CISSP-ISSAP, CISSP-ISSEP, CSSLP, or CASP+ CE.
• Familiarity with NIST SP 800 publications and CNSSI 1253.
• Experience RMF/ATO for DoD/IC systems.
• Experience with incident response plans, POA&Ms, risk and vulnerability management.
• Experience establishing SSE management to integrate security and privacy controls.
• Experience leading a team of CSEs and ISSOs.
• Experience using Tenable Security Center and related tools.
• Experience with Linux, Windows, firewalls, VPCs, PKI.

Responsibilities

• Provide expert guidance to streamline ATO management with engineering solutions.
• Lead architecture and implementation of streamlined security, governance, and accreditation models.
• Provide expert technical guidance to team members on security solutions.
• Interact with client CIO and Security POCs.
• Create, improve, and maintain security policies and procedures.
• Provide OS hardening and patching guidance per DISA STIGs and NIST.
• Analyze security incidents and deliver remediation recommendations.
• Collaborate across teams to deliver quality service and product.

Skills

Analytical skills

Communication

Problem solving

Interpersonal skills

Education

BS degree + 15+ years

Tools

Tenable Security Center

Jira

Confluence

Kubernetes

Rancher

Cloudera

Active Directory

Elasticsearch

SQL/NoSQL

Job description

Are you ready to join Leidos all-star team? Through training, teamwork, and exposure to challenging technical work, let Leidos show how to accelerate your career path. Leidos has an exciting opening for you as our next TS/SCI Security Engineer Solution Architect supporting the creation of an Enterprise AI Platform and Digital Services Framework for a Defense Intelligence Enterprise (DIE) client. Have impact as part of a mission focused, solutions oriented, and adaptive team that values innovation, collaboration, and professional development. As the Security Engineering Solution Architect, your job is to provide technical security expertise in a primarily cloud infrastructure with focus on leading teams through the Risk Management Framework to system ATOs across multiple domains. You will lean on your experience with security technologies and industry best practices while employing effective security solutions. You are a demonstrated leader, skilled at achieving cross functional collaboration in a dynamic and fast paced environment. Work will be conducted both remotely and on-site at several locations, primarily but not exclusively within the National Capital Region (NCR).

Responsibilities

• Provide expert guidance to enable streamlining ATO management processes with engineering solutions and best practice efficiencies
• Lead solution architecture and implementation of streamlined security, governance, and accreditation support model, including automation of compliance processes
• Provide expert technical guidance to team members while employing security solutions
• Directly interact with client CIO and Security POCs
• Create, improve, and maintain security policies and procedures
• Provide operating system hardening and system patching guidance based on DISA STIGs and NIST publications
• Analyze security incidents and provide recommendations for resolution
• Strong knowledge and experience in software development in an Agile environment
• Manage individual project priorities, deliverables, and deadlines.
• Foster an environment of collaboration with the different team members in the goal of providing quality service and product to our customer.

Qualifications

• BS degree and 15+ years of prior relevant experience or Masters with 15+ years of prior relevant experience
• An active TS/SCI clearance with the ability to obtain/maintain a Polygraph
• Have at least one of the following DoD 8570.01-M IASAE Level II certifications: CISSP, CISSP-ISSAP, CISSP-ISSEP, CSSLP, or CASP+ CE. NOTE: the CISSP Associate is not acceptable
• Familiarity with NIST Special Publications e.g. NIST SP 800-27, 30, 37, 53, 60
• Experience with CNSS publication CNSSI 1253
• Experience supporting DoD/IC systems through the entire Risk Management Framework Plus (RMF) process to ATO
• Experience with incident response plans, plans of actions and milestones (POA&Ms), risk management plans, and vulnerability management plans
• Experience establishing and maintaining a System Security Engineering (SSE) management process to integrate security and privacy controls into complex hardware and software systems
• Experience managing a team of Cyber Security Engineers (CSEs) and Information System Security Officers (ISSOs)
• Experience using Tenable Security Center and all components
• Experience with technologies such as Linux, Windows, firewalls, gateways, proxies, VPCs, and public key infrastructure.
• Strong analytical, communication, problem-solving, and interpersonal skills

Preferred Qualifications

• An active TS/SCI clearance with Poly Certified Scrum Master (CSM) or SAFe Scrum Master (SSM) certification
• Successfully achieved ATO under RMF+ across multiple domains
• Experience working in Agile and DevOpsSec environments
• Experience with big data applications
• Experience with Jira and Confluence
• Experience with OIDC or Oauth2
• Experience with any of the following technologies: Kubernetes, Rancher, or Cloudera containerization technologies
• CI/CD tools like Jenkins or Gitlab
• Elasticsearch
• Active Directory
• SQL and NoSQL databases
• Scripting languages like bash, python, or PowerShell

#ASBA #NMEC-Leidos

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting: August 7, 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.

Pay Range

Pay Range: Pay Range $154,050.00 - $278,475.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.