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Sr Scientist, Info Security Systems Engineer
Sr Scientist, Info Security Systems Engineer-December 2024
Greenville
Dec 5, 2025
About Sr Scientist, Info Security Systems Engineer

  Job Title: Sr Scientist, Info Security Systems Engineer

  Job Code: 8380

  Job Location: Greenville, Tx

  Schedule: (9/80)

  L3Harris is dedicated to recruiting and developing diverse, high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.

  About L3Harris Technologies:

  L3Harris Technologies is an agile global aerospace and defense technology innovator, delivering end-to-end solutions that meet customers’ mission-critical needs. The company provides advanced defense and commercial technologies across space, air, land, sea and cyber domains. L3Harris has approximately $18 billion in annual revenue and 47,000 employees, with customers in more than 100 countries.

  Job Description:

  As a Sr Scientist Information Systems Security Engineer (ISSE), you will serve as an Anti-Tamper (AT) Subject Matter Expert (SME). You will lead the charge to develop, assess, implement, and verify AT solutions in accordance with DoDD 5200.47E.

  You will work closely with a variety of personnel, ranging from fellow L3Harris SMEs to vendors, customers, and government evaluators.

  Serve to ensure the ISSM's priorities for system authorization efforts are communicated effectively to the L3H personnel that perform functions that impact or support the achievement of an Authority to Operate (ATO) to include: software authorization, DevSevOps pipeline design, compliance, vulnerability and software code scanning activities, system security testing, authorization documentation development, system hardening, etc.

  This position helps ensure that L3H efforts facilitate the movement of multiple information systems through the RMF process and authorizations are maintained through continuous monitoring and annual reviews.

  Participate in risk and vulnerability assessments (as required) of information systems to identify vulnerabilities, risks, and protection needs, coordinate L3H efforts to develop Security Impact Assessments (SIAs) of proposed system modifications for submittal to the ISSM.

  Collectively demonstrate exceptional technical competence, reliability in delivering mission-critical infrastructure, and continually ensure the highest levels of accessibility, optimization, and security.

  Understanding of both software engineering, hardware engineering, and program management.

  Prepare and present technical results for internal and external program meetings

  Document and support infrastructure, network, & mission processor design verification tests within lab, ground and flight test environments.

  Develop, track and present technical metrics

  Manage requirements using collaborative tools through all phases of the project.

  Read and interpret block diagrams, wire diagrams, mechanical drawings and circuit schematics

  Essential Functions:

  Active Secret and must be eligible to obtain and maintain TS/SCI Clearance, ability to travel, working extended hours

  Lead the development and implementation of AT throughout the System Development Lifecycle. Key tasks include:

  Assessing systems for Critical Program Information,

  Conducting trade studies,

  Developing AT requirements,

  Implementing security architectures,

  Assessing threats via attack/countermeasure analysis,

  And conducting Verification and Validation activities.

  Author technical reports for review by customers, government authority, and/or key DoD decision makers.

  Work cross-functionally to ensure security architectures meet all stakeholder needs.

  Support internal and external working groups, technical interchange meetings and design review milestones (SRR, PDR, CDR, etc.) with customers and suppliers.

  Serve as a SME in the areas of Cybersecurity and AT.

  Develop engineering efforts and support proposal efforts.

  Train and mentor developing engineers to bolster internal talent.

  Qualifications:

  Education/Experience:

  Bachelor’s Degree and minimum 15 years of prior direct program experience.

  Graduate Degree and a minimum of 13 years of prior direct program experience.

  In lieu of a degree, minimum of 19 years of prior direct program experience.

  Excellent verbal communication and technical writing skills. Comfortable interacting with technical peers and working as a part of a team. Capable of writing clear, logical, and effective documents/presentations for the consumption of both technical and non-technical personnel.

  Active Secret and must be eligible to obtain and maintain TS/SCI Clearance, which requires US Citizenship

  Preferred Additional Skills:

  CI Poly

  Experience implementing embedded system-oriented security solutions on Department of Defense systems

  Experience with reverse engineering, cybersecurity (RMF as defined by NIST SP 800-37), or other relevant systems security engineering fields

  Experience with NSA-approved cryptography

  Experience with Model-Based System Engineering and tools

  Experience in Software Assurance and/or Supply Chain Risk Management

  Knowledge of Hardware Description languages (Verilog, VHDL, etc.) and/or software programming languages (C/C++, Assembly, Python languages, etc.).

  DoD 8570.01-M Certifications (e.g., Security+, CASP+, CySA, CISSP, etc.)

  Experience working in Sensitive Compartmentalized Information Facilities and/or Special Access Program facilities

  L3Harris Technologies is proud to be an Affirmative Action/Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug-free workplace and performs pre-employment substance abuse testing and background checks, where permitted by law.

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