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CACI International Land Mobile Radio (LMR) Network Engineer in Alexandria, Virginia

Job Description

CACI is seeking a Land Mobile Radio (LMR) Network Engineer to work with the Department of Homeland Security (DHS-ICE) in Alexandria, VA.

What You’ll Get to Do:

  • Design, repair, and maintain a P25 simulcast conventional and Trunked public safety radio communications systems.

  • Monitor site status and address discovered issues, verify documentation of fielded systems, and interact with end-users to gather information to solve problems

  • Perform installations, repairs/replacements, technical evaluations, and assessments of various radio systems(s), telephonic troubleshooting, and/or maintenances of radio systems at ICE radio sites

  • Install, troubleshoot, and repair, electronic equipment associated with land mobile radio systems

  • Test, repair, and maintain base, mobile, and portable two-way radios and accessory equipment

  • Assemble, connect, and secure such components as transmitters, power supplies, and antenna assemblies Program.

  • Maintain, troubleshoot, and repair the following LMR assets: APX 7000, APX 7500, XT 5000, XTL 5000, XTL 5000 consolette, Quantar Repeater, Astro-Tac receiver, Astro-Tac 3000 comparator, GTR 8000 repeater, GPW 8000 receiver, and GCM 8000 comparator.

  • Build radio code plugs for mission-critical operations.

  • Update CPS software and firmware for all radio programming computers.

  • Test, tune, and align duplexers, repeaters, portable radios, and mobile radios.

  • Manage encryption keys using the Motorola Key Management Facility (KMF).

  • Encrypt radios using Over-the-Air-Rekeying (OTAR) or manually by using the KVL-3000+

  • Analyze and interpret circuit wiring, logic cable diagrams, complete communication system schematic diagrams, and network specifications for the purpose of installing, troubleshooting, or maintaining the system or device.

  • Create and maintain end-to-end documentation associated with communications system installation and maintenance

  • Provide emergency on-call service to maintain mission-critical systems.

  • May operate and maintain mobile electronic service shop truck or other service vehicles.

You’ll Bring These Qualifications:

  • US Citizenship with the ability to obtain a DHS Suitability Clearance - High-Risk Rating.

  • Bachelors degree (Physics/Computer Science/Management Information Systems with Electrical and Electronics Engineering or Telecommunications).

  • 8+ years related experience.

  • 5 years of in design and implementation of wireless networks, microwave networks, P25 network technology, propagation analysis, drive testing, model tuning, experience with propagation tools, RF site evaluation, site candidate evaluation/selection, link budget analysis, coverage, and capacity planning, frequency planning, interference analysis, network optimization, and zoning support

  • RF Engineer with Motorola Project 25 (P-25) specific knowledge.


  • Networking from both security and architectural perspectives in a large enterprise environment.

  • Designing or significantly contributed to a large-scale enterprise IP radio system.

  • Routers, firewalls, switches, and modems

  • Juniper Networks’ JUNOS operating system with the ability to design configurations to accomplish unique service offerings.

  • Firewall policies for known traffic and services.

  • Understand routing protocols such as OSPF, BGP, and MPLS

  • IPsec VPNs of various topologies such as site-to-site, hub-and-spoke, and full mesh.

  • Segregate networks into subnets using CIDR

  • Circuit integration with Telco vendors highly preferred using MPLS, DS3, T1, leased lines, and POTS.

P25 Radio System Design, Staging, and Installation:

  • Experience designing or contributing to large-scale conventional multicast system implementations using both ASTRO 25 3.1 (Quantar) and ASTRO 25 7.X (GTR) equipment.

  • Experience with large-scale trunking systems using ASTRO 25 7.X equipment.

  • Experience with ASTRO 25 7.X DSR Core provisioning manager, Key Management Facility (KMF), WAVE, and other key components.

  • Experience with Motorola gateways such as GGM 8000 preferred.

  • Experience staging equipment to include assembling equipment in a rack or cabinet, electrical and signal wiring, configuration, RF filter tuning, acceptance testing, and quality control.

  • Experience installing equipment at a radio shelter and following R56 guidelines.

  • Able to tune RF filters such as duplexers, receiver preselectors, transmitter combiners, and receiver multicouplers

  • Able to build and terminate RF cables, standard and custom cables using CAT5 or CAT6.

  • Experience with P25 concepts such as ISSI, CSSI, and DFSI.

  • Experience surveying radio sites in light of Motorola R56 requirements, Telco presence, access, and security.

Subscribers/ Propagation Modeling

  • Must be familiar with XTS/XTL/APX series of Motorola subscribers and capable of writing codeplugs for system testing

  • Must have working knowledge of RF propagation modeling of large radio systems

These Qualifications Would be Nice to Have:

  • JNCIA-JUNOS certification preferred

  • CompTIA Security+ preferred

  • Juniper edge and branch devices such as SRX and MX series preferred

  • HP/Aruba switches preferred

  • ATDI HTZ Warfare and Spectrum-E highly preferred

  • ATAK training, experience, certification

  • SolarWinds Orion and other network management tools

What We Can Offer You:

  • We’ve been named a Best Place to Work by the Washington Post.

  • Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives.

  • We offer competitive benefits and learning and development opportunities.

  • We are mission-oriented and ever vigilant in aligning our solutions with the nation’s highest priorities.

  • For over 55 years, the principles of CACI’s unique, character-based culture have been the driving force behind our success.

Job Location


CACI employs a diverse range of talent to create an environment that fuels innovation and fosters continuous improvement and success. At CACI, you will have the opportunity to make an immediate impact by providing information solutions and services in support of national security missions and government transformation for Intelligence, Defense, and Federal Civilian customers. CACI is proud to provide dynamic careers for employees worldwide. CACI is an Equal Opportunity Employer - Females/Minorities/Protected Veterans/Individuals with Disabilities.