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Senior Specialist, IT Security

Greenville, Texas
Full Time On-site

Summary

Job Description

The Senior IT, Security Specialist would oversee the protection, handling, and compliance of sensitive government information. Develop policies, manage training, and implement IT security controls to meet DFARS/CMMC requirements acting as the central point for internal and external audits and risk management. 

Essential Functions:

  • Documentation Management:Lead the creation and maintenance of the System Security Plan (SSP) and the Plan of Action and Milestones (POA&M). Requirements traceability matrix’s.
  • Audit Liaison:Act as the primary point of contact for C3PAO (Third-Party Assessment Organizations) and manage formal assessments.
  • Risk Remediation:Oversee the closing of security gaps identified during internal or external readiness assessments
  • Continuous Monitoring:Conduct regular system audits (inventory control and cyber audits), incident response testing, and ongoing policy enforcement
  • Personnel Security: Develop and deliver role-based security training 
  • Microsoft Office Suite and tools: Experience with the Office suite of tools Word, Excel, Powerpoint, Visio, OneNote, SharePoint
  • Scan Compliance :Nessus and SCAP scanning, results remediation tracking

Qualifications: 

  • 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.
  • Requires an Active Secret Security Clearance.
  • 4–7 years in government compliance, security, or project management, specifically with DOD regulations or cybersecurity frameworks.
  • Deep understanding of NIST SP 800-171, DFARS, and NARA CUI guidelines.
  • Ability to identify and classify Controlled Unclassified Information (CUI) and Federal Contract Information (FCI) within the organization.
  • The position involves heavy lifting, ladder work, and working in tight or confined areas.
  • May require up to 5% travel CONUS

Preferred Additional Skills:

  • CMMC Certified Professional (CCP) or CMMC Certified Assessor (CCA) designations.

#LI-TD4 

L3Harris Technologies is proud to be an 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.

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 L3Harris 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.

L3Harris Technologies is an E-Verify Employer. Please click here for the E-Verify Poster in English or Spanish. For information regarding your Right To Work, please click here for English or Spanish.

About L3 Harris

L3 Harris

L3 Harris is one of the largest defense and aerospace companies in the United States, delivering advanced technologies that support missions across air, land, sea, space, and cyber domains. The company develops communications systems, space payloads, intelligence platforms, electronic warfare capabilities, missile defense technologies, and mission-critical sensors used by the U.S. military, intelligence community, and allied nations around the world.

For job seekers, L3Harris offers opportunities across engineering, software development, cybersecurity, space systems, manufacturing, intelligence, program management, and mission operations. The company is especially attractive to veterans, cleared professionals, and engineers who want to work on advanced technologies that directly support national security. With programs spanning tactical communications, ISR platforms, satellite systems, and defense electronics, employees have the opportunity to contribute to some of the military’s most important capabilities.

Unlike companies focused on a single mission area, L3Harris operates across a diverse portfolio of defense technologies, providing employees exposure to a broad range of programs and technical disciplines. Teams work on everything from secure communications and autonomous systems to space-based sensors and electronic warfare platforms, creating opportunities for both specialization and long-term career growth within the organization.

As governments continue investing in modernization, space capabilities, resilient communications, and advanced sensing technologies, L3Harris remains one of the most important employers in the defense industry. For professionals seeking a mission-driven career with strong growth opportunities, technical challenges, and direct impact on global security, L3Harris continues to stand out as a leading destination in aerospace and defense.

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