MANTECH

Oct 27, 2026

Field Service Engineer

United States

Takaoka, Japan · Herndon, Virginia, United States

DESCRIPTION & REQUIREMENTS

Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we’ve been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary. Your journey starts now—protect and innovate with MANTECH!

MANTECH seeks a motivated, career and customer-oriented Field Service Engineer under the Global Services Management – Operations II (GSM-O II) contract out of Japan. This contract provides support to the Defense Information System Network (DISN) and associated networking capabilities. MANTECH also provides Field Engineering support for DISA for all sites in Europe, Asia, Africa, and the Western Pacific and Alaska.

Job Responsibilities include but are not limited to

Performing installation / removal / upgrade / interface actions associated with network components at user locations.

Inventorying shipments, installing racks, equipment, infrastructure and providing redline installation documents and completion reports.

Facilitating and finalizing all aspects of site acceptance. Activating / deactivating network components according to established schedules.

Coordinating with users, site/base support, security offices and or facilities personnel, network manager(s) and controllers, long haul and local carriers for site access, installation, cutover, activation, deactivation, planning and execution.

Installation of DISA’s IP based (classified/unclassified) LAN/WAN, DWDM and SONET networks whether it be hardware or software upgrades/fixes, on routers, switches, long haul transport, servers, cryptographic systems and other IT equipment.

Assisting DISA and other end users in troubleshooting and recovering systems and files; installing operating systems, network systems, applications, and testing head to head running BERT tests across the path, checking framing, line coding, protocols, Sonet, and IP.

Utilizing OTDR and OSA test equipment to troubleshoot / analyze long haul fiber and DWDM circuit outages.

Perform detailed and technically in-depth site survey functions at user locations as required in order to assess / analyze site preparedness, develop installation plans, minor installation parts lists and associated cost estimates.

Setting up and maintaining the following devices / vendors: CISCO, Juniper, Safenet, Ciena, and Sycamore.

Mandatory Qualifications

High School Diploma and at least 4 years of relevant experience to include the following:

Experience with one of more: fault management, configuration management, and WAN maintenance.

Expertise in one or more of the following: IP routing, Optical, Crypto, Network appliances (WAN acceleration, etc.)

Ability to work in a team focused, dynamic environment

Experience in fabrication of serial, cat6, coax, fiber and DC power cable fabrication for equipment installations, modifications, and upgrades.

Experienced with major vendors, i.e. Sycamore, Ciena, Juniper, Promina, Cisco.

Security Clearance Required

Must have a current / active DoD Secret security clearance and be willing and able to obtain a Top Secret security clearance.

Physical Requirements

Must be able to remain in a stationary position 50%.

Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.

Frequently communicates with co-workers, management, and customers, which may involve delivering presentations.

Preferred Qualifications

Manufacturer certifications for vendor specific equipment (i.e. CISCO, Juniper, etc.)

DoD 8570 IAT Level II Certification (Security+CE or equivalent or higher certification)

The projected compensation range for this position is $59,700.00-$99,600.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH’s benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.

GENERAL INFORMATION

MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.

If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.

Requisition # R71704

Locations USA-VA-Herndon, International-Japan-Yokota

Posting Date 10/27/2026

Security Clearance Required Secret

Remote Type Onsite

Time Type Full time

Languages

Field Service Engineer

DESCRIPTION & REQUIREMENTS

Job Responsibilities include but are not limited to

Mandatory Qualifications

Security Clearance Required

Physical Requirements

Preferred Qualifications

GENERAL INFORMATION

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