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Salary
≈ $123k – $240k per year (Estimated)
Location
In office (Amarillo)
Seniority
Staff · 10+ years exp
Visa
H-1B filings in 12 months: 49 · for this role: 1 · green card filings: 7

Confirmed on the employer's own hiring board on Oct 5, 2026. First seen by Alion on Oct 1, 2026.

Overview
Company
Impact
Profile match
Geosyntec Consultants is an engineering and consulting firm headquartered in Columbia, Maryland, that serves public and private clients on environmental, water, natural resources and civil infrastructure problems. Founded in 1983 and employee-owned, it works from offices across the US and abroad, and its subsidiary Longenecker and Associates supports Department of Energy nuclear security and remediation work at sites such as Oak Ridge and Los Alamos. It hires remediation, geotechnical, water resources, coastal and structural engineers, geologists, chemists, construction managers, CAD technicians and interns.

Overview

Longenecker & Associates (L&A), a Geosyntec Company, is a trusted partner enabling critical missions across the U.S. Department of Energy (DOE) complex for more than 30 years. We contribute to DOE’s nuclear security and environmental remediation enterprise by providing the highest-caliber staff and experts. We are seeking a motivatedIT Networking VoIP Engineer to contribute to our mission supporting our work at Pantex in Amarillo, TX.

Geosyntec is an innovative, international engineering and consulting firm serving private and public-sector clients to address new ventures and complex problems involving our environment, natural resources, and civil infrastructure. Our engineers, scientists, technical and project employees serve our clients from offices across the world. Ranked by ENR as one of the top environmental engineering design firms, Geosyntec is internationally known for its technical leadership, broad experience, and exceptional client service.

We invest in our people. Each employee is unique, and your career at Geosyntec will be too. We offer competitive pay and benefits, and well-being programs to support you and your family.

To Learn More Visit: http://www.geosyntec.com/careers/.

Essential Duties and Responsibilities

  • Administer Cisco Unified Communications platforms including CUCM and Unity Connection.
  • Perform voice user administration, moves, adds, changes, and deletions (MACDs).
  • Provision phones, users, hunt groups, and voicemail services within established SLAs.
  • Maintain 99.9% availability of Cisco UC applications and supporting network infrastructure.
  • Monitor system health, capacity, licensing, and trunk utilization.
  • Manage Cisco TAC cases and provide root cause analysis for critical incidents.
  • Maintain STIG compliance and remediate vulnerability findings.
  • Manage SSL/TLS certificates and prevent service outages due to expiration.
  • Administer voice gateways, dial plans, route patterns, translation patterns, and call routing services.
  • Support PBX-to-VoIP migration projects and phased cutovers.
  • Maintain documentation, Visio diagrams, asset inventories, and SOPs.
  • Provide network operations support for switches, F5 load balancers, and Infoblox services.

Education and Licensure

  • Bachelor’s degree in a related field and a minimum of 5 years of relevant experience.
  • Master’s degree in a related field and a minimum of 2 years of relevant experience.
  • Experience in lieu of education: A combination of 10 or more years of relevant education, training, and/or professional experience may be considered in place of the degree requirement.

Skills, Experience and Qualifications

REQUIRED SKILLS, EXPERIENCE AND QUALIFICATIONS:

  • At least 5 years of relevant experience or equivalent combination of education and experience. (required)
  • Experience supporting enterprise network and voice infrastructures. (required)
  • Must possess an active DoD Top Secret (TS) clearance or DOE Q Clearance, or have previously held one and be eligible for reinstatement. (required)
  • Due to federal contract security requirements, this position requires U.S. Citizenship. (required)
  • Due to federal contract security requirements, candidates must be able to successfully pass a federal background investigation to secure and maintain DOE Q security clearance. (required)
  • Health & Safety training, medical monitoring, and client-driven drug and background testing. (required)

PREFERRED QUALIFICATIONS & LOCATION DETAILS:

  • Cisco routing and switching
  • Cisco Catalyst Center (DNA Center)
  • Cisco Wireless LAN Controllers and Access Points
  • Cisco VoIP technologies including CUCM, Unity Connection, and IM & Presence
  • Tenable vulnerability management
  • Splunk monitoring and dashboards
  • NOC/SOC monitoring and network management
  • This position is onsite and requires full-time attendance in Amarillo, TX.

Please note that federal contractors are required to maintain a drug-free workplace. Regardless of state laws permitting medical or recreational marijuana use, employees working under federal contracts may be subject to federal requirements that prohibit marijuana use.

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