Security Architect

Leidos; Reston (VA); Hybrid; USD 154,000 - 278,000; Full time

Job summary

Leidos seeks a Security Engineer Solution Architect to lead enterprise security for a Defense Intelligence Enterprise project. You will guide RMF/ATO processes, advise on governance and automation, and interact with client CIOs while ensuring strong security across cloud and on-site environments.

The role requires an active TS/SCI clearance, DoD RMF experience, and extensive collaboration with PMs and engineers to deliver secure, compliant solutions.

Qualifications

• Active TS/SCI clearance with ability to obtain/maintain a Polygraph.
• DoD 8570.01-M IASAE Level II certs (CISSP family or CASP+).
• Experience supporting RMF-based ATO processes for DoD/IC.
• Familiarity with NIST SPs and CNSSI 1253 guidance.
• Experience leading security architecture in cloud environments.
• Experience managing security teams and delivering secure software.

Responsibilities

• Lead architecture and implement streamlined security, governance, and accreditation models.
• Provide expert security guidance across Linux/Windows, networks, and cloud infra.
• Interact with client CIOs and POCs; develop security policies and procedures.
• Drive RMF/ATO activities, incident response plans, and POA&Ms.
• Foster collaboration among PMs, engineers, and security teams for quality outcomes.

Skills

TS/SCI clearance

Polygraph

CISSP/CISSP-ISSAP/CISSP-ISSEP/CSSLP/Cy

NIST publications familiarity

CNSSI 1253 knowledge

RMF/ATO experience

POA&Ms & risk management plans

SSE management

Lead Cyber Security Engineers/ISSOs

Tenable Security Center

Linux/Windows security

Firewalls/PKI/VPCs

Strong communication & collaboration

Education

BS degree + 15+ years experience

Tools

Jira

Confluence

RMF tooling

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).

As an integral member of the team, you will work closely with Program Management, Security and System Engineers on the following key tasks:

• 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.

You demonstrate a solid understanding of security best practices and meet the following 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

You will wow us even more if you have some of these:

• 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:

#ASBA

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.

Pay Range $154,050.00 - $278,475.00

The Leidos pay range for this job level is a general guideline onlyand 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.