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Sr. Specialist, ISSE

Job in Greenville, Greenville County, South Carolina, 29610, USA
Listing for: L3Harris
Full Time position
Listed on 2026-02-01
Job specializations:
  • Engineering
    Cybersecurity
  • IT/Tech
    Cybersecurity
Salary/Wage Range or Industry Benchmark: 80000 - 100000 USD Yearly USD 80000.00 100000.00 YEAR
Job Description & How to Apply Below

Job Title:

Sr. Specialist, ISSE Job Code: 33226

Job Location:

Greenville, TX

Schedule:

9/80

Job Description:

L3

Harris is seeking an experienced Information System Security professional with particular technical experience in network appliances such as routers, switches, and firewalls that would work across multiple product lines within L3

Harris’ Intelligence, Surveillance, and Reconnaissance (ISR) portfolio. You will be part of a diversely skilled engineering team in the design, implementation, and testing of complex interoperable systems.

This position will work closely with applicable Information System Owner(s), information systems engineers, program management, and product development teams to explain and interpret cybersecurity processes, practices, and procedures such as Risk Management Framework (RMF), NIST 800-53, and Security Technical Implementation Guides (STIGs).

Overall duties include but are not limited to:
  • Designing and Implementing Security Solutions:
    Develop and maintain network security systems, including firewalls, VPNs, and intrusion detection systems.
  • Developing Security Policies:
    Create and enforce network security policies and procedures to safeguard sensitive information.
  • Monitoring Network Activity:
    Continuously monitor network traffic for unusual activity and potential security breaches.
  • Conducting Security Audits:
    Perform regular security assessments, vulnerability management, and audits to ensure compliance with industry standards and regulations.
  • Responding to Incidents:
    Investigate and respond to security incidents, providing timely resolutions and reporting findings.
Job Requirements:
  • Bachelor’s Degree and minimum 6 years of prior relevant experience. Graduate Degree and a minimum of 4 years of prior related experience. In lieu of a degree, minimum of 10 years of prior related experience.
  • Top Secret Clearance with ability to obtain SCI.
  • Requires on-site presence at the Greenville, TX location, with the potential for occasional telecommuting. Business travel equates to approx. 10% of man-year.
  • CompTIA Security+ or equivalent certification.
  • Fluent understanding of networking design including proper isolation, segmentation, and bandwidth management.
Preferred Additional

Skills:
  • Experience with networking topologies such as in-line encryption, intrusion prevention/detection systems, and virtual networks.
  • Track record of collaboration with other functional organizations to ensure security measures are integrated into day-to-day processes.
  • Learning mindset to stay current with the latest security trends, threats, and technology solutions.
  • Aptitude and interest in mentorship and guidance to junior security engineers and IT staff.
  • Associate of CISSP, CISSP, CCNA Security, CSA+, GICSP, GSEC, Security+ CE, SSCP, Linux+, Cloud+
  • Strong technical writing skills.
  • Familiarity with common engineering tools such as JIRA, Confluence, DOORS.
  • Familiar with security engineering principles, design patterns, and processes.
  • Experience with matrixed development teams (hardware, software, systems engineers) and embedded systems engineering

L3

Harris Technologies is proud to be an Equal Opportunity Employer. L3

Harris 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.

L3

Harris maintains a drug-free workplace and performs pre-employment substance abuse testing and background checks, where permitted by law.

Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information.

By submitting your resume for this position, you understand and agree that L3

Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions.

L3

Harris Technologies is an E-Verify Employer. Please  for the E-Verify Poster in English or Spanish. For information regarding your Right To Work, please  for English or Spanish.

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