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Sr. Specialist, Systems Engineer (RF/COMMS)

L3Harris Technologies

Engineering Jobs

Sr. Specialist, Systems Engineer (RF/COMMS)

full-timePosted: Jan 15, 2026

Job Description

L3Harris is dedicated to recruiting and developing 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.

L3Harris Technologies is the Trusted Disruptor in the defense industry. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

Job Title: Sr. Spec, System Engineering

Job Code: 30806

Job Location: Greenville, TX (On-Site)

Job Schedule: 1st Shift 9/80

Job Description:

The Senior Systems Engineer Specialist will be responsible for providing systems level engineering guidance and leadership to contributing disciplines within an RF/COMMS systems engineering group.

Essential Functions: 

  • Perform systems level requirements, design, test, and integration of RF and Communications systems on various air and ground platforms.
  • Interfaces with the customer to determine system specific requirements. 
  • Design and test wideband systems in Ku, Ka, L-S-C and X bands. 
  • Design and test communications systems for HF, V/UHF LOS, and UHF Satcom systems.
  • Design encryption systems for IP, Voice and data systems.
  • Work with tactical systems such as IBS, Link 16 and Link 11.
  • Perform link budget analysis, cost analysis, and cascade analysis.
  • Experience with COMSEC and cryptological devices.
  • Able to read and understand engineering wiring diagrams and related drawings, create and maintain spreadsheets, charts, reports, investigation and test plans and procedures.
  • Proficient with RF test equipment including network analyzer and spectrum analyzer. 
  • Supports/perform RF systems and antenna installation/test both on and offsite.
  • Able to physically climb antenna towers for installation, test, and repairs of communication systems.
  • RF proto-typing and assembly skills for quick reaction capabilities.
  • Knowledge of EMI mitigations techniques. 
  • Experience with tools such as DOORS, JIRA, Mentor Graphics, MBSE.
  • Uses Part Smart, Teamcenter and associated tools.
  • Researching/selecting cables, connectors and RF components.
  • Other duties as assigned by Supervisor.

Qualifications:

  • B.S. Degree with six (6) years of RF and/or COMMS experience.
  • Graduate degree with four (4) years of RF and/or COMMS experience.
  • In Lieu of a degree, a minimum of ten (10) years of RF and/or COMMS experience.
  • Must have an active Secret Clearance at the time of hire, with the ability to obtain Top Secret (TS/SCI) Security Clearance.
  • Must successfully obtain a class III flight certification.
  • Must be a U.S. Citizen.

Preferred Additional Skills:

  • Experience with RC-135 Big Safari aircraft.
  • Active Top Secret with SCI.

#LI-AH1

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.

Locations

  • Greenville, TX, United States

Salary

Estimated Salary Rangemedium confidence

95,000 - 155,000 USD / yearly

Source: AI Estimation

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • RF systems engineeringintermediate
  • Communications (COMMS) systemsintermediate
  • Wideband systems in Ku, Ka, L-S-C, X bandsintermediate
  • HF, V/UHF LOS, UHF Satcom systemsintermediate
  • Encryption systems for IP, Voice, dataintermediate
  • Tactical systems (IBS, Link 16, Link 11)intermediate
  • Link budget analysisintermediate
  • Cost analysisintermediate
  • Cascade analysisintermediate
  • COMSEC and cryptological devicesintermediate
  • Reading engineering wiring diagramsintermediate
  • RF test equipment (network analyzer, spectrum analyzer)intermediate
  • RF systems and antenna installation/testintermediate
  • Climbing antenna towersintermediate
  • RF proto-typing and assemblyintermediate
  • EMI mitigation techniquesintermediate
  • DOORS, JIRA, Mentor Graphics, MBSEintermediate
  • Part Smart, Teamcenterintermediate
  • Researching cables, connectors, RF componentsintermediate

Required Qualifications

  • B.S. Degree with 6 years RF/COMMS experience (experience)
  • Graduate degree with 4 years RF/COMMS experience (experience)
  • 10 years RF/COMMS experience in lieu of degree (experience)
  • Active Secret Clearance (ability to obtain TS/SCI) (experience)
  • Class III flight certification (experience)
  • U.S. Citizen (experience)

Responsibilities

  • Provide systems level engineering guidance and leadership
  • Perform systems level requirements, design, test, integration of RF/COMMS systems on air/ground platforms
  • Interface with customer for system requirements
  • Design and test wideband systems
  • Design and test communications systems
  • Design encryption systems
  • Work with tactical systems
  • Perform link budget, cost, cascade analysis
  • Read/understand engineering diagrams, create spreadsheets/charts/reports/test plans
  • Support/perform RF systems and antenna installation/test on/offsite
  • Climb antenna towers for installation/test/repairs
  • RF proto-typing and assembly
  • Research/select cables, connectors, RF components
  • Other duties as assigned

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L3Harris Technologies logo

Sr. Specialist, Systems Engineer (RF/COMMS)

L3Harris Technologies

Engineering Jobs

Sr. Specialist, Systems Engineer (RF/COMMS)

full-timePosted: Jan 15, 2026

Job Description

L3Harris is dedicated to recruiting and developing 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.

L3Harris Technologies is the Trusted Disruptor in the defense industry. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

Job Title: Sr. Spec, System Engineering

Job Code: 30806

Job Location: Greenville, TX (On-Site)

Job Schedule: 1st Shift 9/80

Job Description:

The Senior Systems Engineer Specialist will be responsible for providing systems level engineering guidance and leadership to contributing disciplines within an RF/COMMS systems engineering group.

Essential Functions: 

  • Perform systems level requirements, design, test, and integration of RF and Communications systems on various air and ground platforms.
  • Interfaces with the customer to determine system specific requirements. 
  • Design and test wideband systems in Ku, Ka, L-S-C and X bands. 
  • Design and test communications systems for HF, V/UHF LOS, and UHF Satcom systems.
  • Design encryption systems for IP, Voice and data systems.
  • Work with tactical systems such as IBS, Link 16 and Link 11.
  • Perform link budget analysis, cost analysis, and cascade analysis.
  • Experience with COMSEC and cryptological devices.
  • Able to read and understand engineering wiring diagrams and related drawings, create and maintain spreadsheets, charts, reports, investigation and test plans and procedures.
  • Proficient with RF test equipment including network analyzer and spectrum analyzer. 
  • Supports/perform RF systems and antenna installation/test both on and offsite.
  • Able to physically climb antenna towers for installation, test, and repairs of communication systems.
  • RF proto-typing and assembly skills for quick reaction capabilities.
  • Knowledge of EMI mitigations techniques. 
  • Experience with tools such as DOORS, JIRA, Mentor Graphics, MBSE.
  • Uses Part Smart, Teamcenter and associated tools.
  • Researching/selecting cables, connectors and RF components.
  • Other duties as assigned by Supervisor.

Qualifications:

  • B.S. Degree with six (6) years of RF and/or COMMS experience.
  • Graduate degree with four (4) years of RF and/or COMMS experience.
  • In Lieu of a degree, a minimum of ten (10) years of RF and/or COMMS experience.
  • Must have an active Secret Clearance at the time of hire, with the ability to obtain Top Secret (TS/SCI) Security Clearance.
  • Must successfully obtain a class III flight certification.
  • Must be a U.S. Citizen.

Preferred Additional Skills:

  • Experience with RC-135 Big Safari aircraft.
  • Active Top Secret with SCI.

#LI-AH1

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.

Locations

  • Greenville, TX, United States

Salary

Estimated Salary Rangemedium confidence

95,000 - 155,000 USD / yearly

Source: AI Estimation

* This is an estimated range based on market data and may vary based on experience and qualifications.

Skills Required

  • RF systems engineeringintermediate
  • Communications (COMMS) systemsintermediate
  • Wideband systems in Ku, Ka, L-S-C, X bandsintermediate
  • HF, V/UHF LOS, UHF Satcom systemsintermediate
  • Encryption systems for IP, Voice, dataintermediate
  • Tactical systems (IBS, Link 16, Link 11)intermediate
  • Link budget analysisintermediate
  • Cost analysisintermediate
  • Cascade analysisintermediate
  • COMSEC and cryptological devicesintermediate
  • Reading engineering wiring diagramsintermediate
  • RF test equipment (network analyzer, spectrum analyzer)intermediate
  • RF systems and antenna installation/testintermediate
  • Climbing antenna towersintermediate
  • RF proto-typing and assemblyintermediate
  • EMI mitigation techniquesintermediate
  • DOORS, JIRA, Mentor Graphics, MBSEintermediate
  • Part Smart, Teamcenterintermediate
  • Researching cables, connectors, RF componentsintermediate

Required Qualifications

  • B.S. Degree with 6 years RF/COMMS experience (experience)
  • Graduate degree with 4 years RF/COMMS experience (experience)
  • 10 years RF/COMMS experience in lieu of degree (experience)
  • Active Secret Clearance (ability to obtain TS/SCI) (experience)
  • Class III flight certification (experience)
  • U.S. Citizen (experience)

Responsibilities

  • Provide systems level engineering guidance and leadership
  • Perform systems level requirements, design, test, integration of RF/COMMS systems on air/ground platforms
  • Interface with customer for system requirements
  • Design and test wideband systems
  • Design and test communications systems
  • Design encryption systems
  • Work with tactical systems
  • Perform link budget, cost, cascade analysis
  • Read/understand engineering diagrams, create spreadsheets/charts/reports/test plans
  • Support/perform RF systems and antenna installation/test on/offsite
  • Climb antenna towers for installation/test/repairs
  • RF proto-typing and assembly
  • Research/select cables, connectors, RF components
  • Other duties as assigned

Target Your Resume for "Sr. Specialist, Systems Engineer (RF/COMMS)" , L3Harris Technologies

Get personalized recommendations to optimize your resume specifically for Sr. Specialist, Systems Engineer (RF/COMMS). Takes only 15 seconds!

AI-powered keyword optimization
Skills matching & gap analysis
Experience alignment suggestions

Check Your ATS Score for "Sr. Specialist, Systems Engineer (RF/COMMS)" , L3Harris Technologies

Find out how well your resume matches this job's requirements. Get comprehensive analysis including ATS compatibility, keyword matching, skill gaps, and personalized recommendations.

ATS compatibility check
Keyword optimization analysis
Skill matching & gap identification
Format & readability score

Answer 10 quick questions to check your fit for Sr. Specialist, Systems Engineer (RF/COMMS) @ L3Harris Technologies.

Quiz Challenge
10 Questions
~2 Minutes
Instant Score

Related Books and Jobs

No related jobs found at the moment.