F5 Network Engineer

General information

Requisition #

R71360

Locations

USA-VA-Stafford

Posting Date

10/13/2026

Security Clearance Required

Secret

Remote Type

Onsite

Time Type

Full time

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 F5 Network Engineer to join our team in Stafford, VA.

The successful candidate will be responsible for designing, configuring, testing, and implementing robust LAN/WAN solutions that allow enterprise applications to utilize the MCEN De-Militarized Zone (DMZ). The engineer will manage network traffic routing, support daily operations for both on-premises and cloud networks (AWS, Azure) and play a critical part in troubleshooting and resolving network connectivity issues.

Responsibilities include but are not limited to:

• Design and implement enterprise networking solutions using Cisco and Juniper hardware.
• Manage and support daily operations of network traffic routing for on-premises and cloud environments.
• Develop, update, and validate all network integration documentation.
• Support troubleshooting activities for network connectivity issues reported by application owners.
• Evaluate and apply DISA Security Technical Implementation Guides (STIGs) to all relevant network components.
• Achieve and maintain all required Information Assurance (IA) certifications and training for privileged access to the MCEN.

Minimum Qualifications:

• Bachelor's Degree with at least 4 years of related experience in DoD cloud network constructs in AWS or Azure. An additional 2 years of experience may be substituted in lieu of degree.
• Demonstrated proficiency with Cisco and Juniper network devices (routers, switches).
• A Cisco Certified Network Associate (CCNA) or Juniper Networks Certified Internet Associate for JUNOS (JNCIA-JUNOS) certification is required.
• DoDD 8140/8570 compliant/certified (e.g., current Security+ certification).

Preferred Qualifications:

• Current experience supporting Marine Corps Enterprise Networks
• F5 Certified Technical Specialist certifications for ASM (Test 303), APM (Test 304), and LTM (Tests 301A/301B).

Clearance Requirements:

• An active DoD Secret clearance is required for this position.

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.

The projected compensation range for this position is $109,000.00-$181,500.00. 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.

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.