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Salary
≈ $116k – $231k per year (Estimated)
Location
In office (Richardson)
Seniority
Architect · 16+ years exp
Visa
H-1B filings in 12 months: 5

Confirmed on the employer's own hiring board on Oct 18, 2026. First seen by Alion on Oct 6, 2026. L3Harris Technologies scores A on the Alion truth index.

Overview
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L3Harris Technologies is an American defense contractor formed in 2019 by the merger of L3 Technologies and Harris Corporation. It builds tactical radios and military communication systems, electronic warfare and intelligence, surveillance and reconnaissance equipment, space sensors and satellites, night vision devices, and uncrewed surface vessels, and owns the rocket engine maker Aerojet Rocketdyne. Its main customers are the United States Department of Defense and allied governments. The company is headquartered in Melbourne, Florida, United States.

Job Title: Scientist, Systems Engineering, Cyber Security

Job Code: 45106

Job Location: Plano, TX or Richardson, TX

Job Schedule: 9/80 - Employees work 9 out of every 14 days - totaling 80 hours worked - and have every other Friday off

Job Description:

The Agile Development Group (ADG) specializes in developing disruptive, next-generation technologies for advanced Unmanned Air Systems (UAS / UAV), advanced radar systems, next-generation weapon systems, and other RF sensor technologies.

As a Scientist, Systems Engineering, you will be responsible for leading multiple product development efforts which include: hardware and software requirements definition, decomposition, allocation, management, verification, and validation of technical products and systems. You will also be responsible for leading component trade studies, system integration, and characterization of system performance. You will support technical and cost proposal efforts.

Essential Functions:

  • Requires mastery level knowledge within a specific technical area or multiple job areas. Viewed as an expert and/or resource within the field by peers in and outside the organization.
  • Applies current systems security engineering methods, practices and technologies to the architecture, design, development, evaluation and integration of systems and networks to maintain system security.
  • Works across the business area on products across the system lifecycle, works closely with customers to ensure that the security protection needs, concerns and requirements are defined and implemented with appropriate fidelity and rigor, early, and in a sustainable manner that will allow for the security authorization of the system of interest.
  • Works with systems developers or commercial product vendors in the design and evaluation of state-of-the-art secure systems, networks, and database products using methods such as encryption technology, vulnerability analysis and security management.
  • Responsible for integration of multiple methods into a cohesive system security perimeter and environment while implementing the policies and procedures necessary to monitor and maintain such an environment.
  • Prepares Certification and Accreditation documentation, using multiple industry standards to achieve security authorization of supported systems. Represents program security needs, concerns and requirements at customer meetings.
  • Guides the development and implementation of Anti-Tamper (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
    • Conducting Verification and Validation activities.
  • Serve as a SME in the area of AT.
  • Experience using DoD 5200.39 in identifying and protecting critical program information (CPI).
  • Experience in Engineering trustworthy and secure systems IAW NIST 800-160.
  • Draft Program Protection Implementation Plans (PPIPs), Cybersecurity Strategies, Security Classification Guides (SCGs), and AT Plans
  • Interact with customer to define AT requirements, solutions, trades, costs, implementation, system impacts, and effectiveness
  • Experience in DoD software selection and approval processes for COTS, GOTS and FOSS
  • Support security engineering activities, including basis of estimate development, requirements development, design, test, configuration management and maintenance of information systems and data
  • Assist program security in the development of policies and procedures for emerging security technologies
  • Support the evaluation, qualification, testing and delivery of security architecture improvement, obsolescence replacement and vulnerability response projects
  • Experience with Security Testing and Verification
  • Up to 10% travel may be required

Qualifications:

  • Bachelor’s Degree and a minimum of 12 years of prior relevant experience. Graduate Degree and a minimum of 10 years of prior related experience. In lieu of a degree, minimum of 16 years of prior related experience.
  • Active US Secret security clearance

Preferred Additional Skills:

  • Experience assessing security and privacy controls in embedded systems using NIST 800-53.
  • Experience in Risk Management Framework (RMF) accreditation and authorization (A&A) processes to include RMF steps 1-4 (categorization, controls selection, control implementation, security assessment) and standard body of evidence (BoE) package development.
  • Experience with Multi-Function Processors, Cross-Domain Solutions (CDSs), and Multi-Level Security (MLS) Switches
  • Experience with A&A package processing
  • Experience in RMF accreditation of Platform IT (PIT) systems
  • Experience in configuration and use of cyber defense and vulnerability assessment tools such as ACAS and SCC.
  • NSA Type 1 Certification of cryptographic high assurance devices
  • Experience with NSA High Assurance products and IASRD and SERD requirements
  • Top secret security clearance
  • Experience in proposal capture activities that include customer engagement, needs assessments, shaping acquisition needs/requirements in collaboration with customers, and capture of business against acquisition needs
  • Experience in development of use cases developed from customer objectives and concepts of operations
  • People skills, with experience leading and collaborating in a multi-disciplinary, diverse, and dynamic team environment
  • Extensive experience with radar systems development
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