Leidos has an exciting opening for you as our next TS/SCI Security Engineer Architect working across several Task Orders under the DOMEX Technology Platform (DTP) contract supporting National Digital Exploitation & OSINT Center systems. Have impact as part of a mission focused, solutions oriented, and adaptive team that values innovation, collaboration, and professional development. As the Security Engineering Architect Lead, your job is to provide technical security expertise in our cloud and on-premise 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. While most work is conducted on-site at our client location in Bethesda, MD, we offer a flexible schedule and, occasionally, some tasks may be performed remotely. Percentage of remote work will vary based on client requirements/deliverables. As an integral member of the team, you will work closely with DTP Program Management, Task Order Leads, and Security and System Engineers on the following key tasks: Provide management oversight and coordination of DTP Security Team across multiple Task Orders with a focus on streamlining ATO management processes with engineering solutions and best practice efficiencies Provide technical guidance to team members while employing security solutions Directly interact with DIA CIO and NDOC 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 or SAFe environment Serve as Product Owner for the Security Engineering Team 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 12+ 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 Experience with SAFe methodology 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 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: June 24, 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 $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.