Leidos has a new and exciting opportunity for a Technical Security and Signals Countermeasures (TSSC) Engineer in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA) . 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. At Leidos , we offer competitive benefits , including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security! Job Summary: This position will provide mission support and guidance to the Technical and Signals Security Countermeasures (TSSC) community. This involves providing services in research and reviewing the design, development, and implementation of technical surveillance countermeasures for SCIFs and U.S. diplomatic buildings. This position involves working with teams of architects, intelligence analysts, and technical security engineers to evaluate designs for potential security vulnerabilities as well as formulate/research recommended countermeasures and policies. This includes, but not limited to, assessing leading-edge research in electrical power systems, energy storage technologies, building management systems, and architectural designs in the context of security vulnerabilities and practical countermeasures applications. Successful candidates in this position will have the ability to communicate with executive leadership regarding matters of significant importance to the organization/project. Responsibilities Include: Work with TSSC organizations, intelligence reporting, and external stakeholders to define technical requirements, needs, or problems. Analyze intelligence reporting for TSSC-related vulnerabilities and risks and develop relevant technical analysis products to address the threats and vulnerabilities. Provide technical oversight to security research activities in fields of electrical, acoustic, optical, and radio frequency countermeasures domains. Review construction blueprints and designs of IC, SCIFs, and U.S. diplomatic facilities for compliance with security requirements and provide recommended solutions. Respond to requests for information on potential technical security vulnerabilities. Leverage your engineering expertise to provide input to draft policies, best practices, and studies. Work collaboratively across multiple U.S. Government IC agencies and Department of State to successfully advocate practices, new concepts, and approaches. Basic Qualifications: Must have TS/SCI with CI Polygraph Bachelor of Engineering degree and 12 – 15 years of prior relevant experience or Masters with 10 – 13 years of prior relevant experience. At least 5 years’ experience performing or reviewing technical research in TSSC or general engineering fields. Understanding of ICD-702 and ICD-705 and applying them to real-world scenarios. Experience reviewing and analyzing intelligence reporting on scientific/technical topics. Preferred Qualifications: Experience reviewing and analyzing intelligence reporting on emerging technologies. Deep understanding of electrical power systems and energy storage technologies. Deep and practical understanding of secure USG facilities construction, maintenance, and operation in domestic and overseas environments. Experience in conducting Technical Surveillance Countermeasures (TSCM) surveys. Experience installing/designing secure power systems for Intelligence Community facilities and/or US Embassies. Experience performing collection or analysis of TSSC-related intelligence products in at least one of the following technical domains: acoustic, electrical, optical, and radio frequency (wireless) domains in current or prior roles. Demonstrated ability to develop solutions that are highly innovative and achieved through research and integration of best practices. Experience with reading and interpreting blueprints and design documents for large, complex facilities At Leidos, the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you – apply today. Original Posting:

June 24, 2025 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 $126,100.00 - $227,950.00 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.