NGE - Network Design Engineer Architect / Lead IRES - SSFB/HSV/FBEL

Amentum; Arlington (VA); On-site; USD 175,000 - 225,000; Full time

Benefits offered by this job

Health Insurance

Dental Insurance

Vision Insurance

PTO & Holidays

401(k) Matching

Educational Reimbursement

Parental Leave

Employee Stock Purchase Plan

Tax-saving Options

Disability Insurance

Life Insurance

Pet Insurance

Job summary

Amentum is seeking a Network Design Engineer Architect/Lead for the Next Generation Environment (NGE) on the IRES contract. The role is based at Fort Belvoir, VA, and involves leading architecture, modernization, and governance across DoD networks.

You will mentor engineers, translate mission needs into roadmaps, and design Cisco Nexus EVPN‑VXLAN fabrics, NSX, Versa SD‑WAN, F5 BIG-IP, and Infoblox DDI for secure, multi-cloud environments.

Qualifications

• Must have 12+ years of general (full-time) work experience.
• Must have 6+ years of directly related experience designing and leading large-scale DoD networks.
• Must have 1+ year in a management or leadership role.
• Expert level knowledge of routing and switching (BGP, OSPF, IS-IS), EVPN/VXLAN, MPLS, QoS, IPv6, multicast, and resiliency.

Responsibilities

• Lead Network Architecture and governance across multi-contractor program.
• Mentor and manage a team of network design and implementation engineers.
• Architect scalable data center fabrics and hybrid multi-cloud networking.
• Define security, zero-trust, and ICAM integration across environments.

Skills

Leadership

Routing & Switching

Zero Trust

Hybrid/Multi-Cloud

DoD Networking

Education

Bachelor's degree in Computer Science/IT

Tools

Cisco Nexus

NSX

Versa SD-WAN

F5 BIG-IP

Infoblox DDI

Job description

Position Title: NGE - Network Design Engineer Architect / Lead

Location: Schriever Space Force Base, Colorado Springs, CO, Redstone Arsenal, Huntsville, AL, or Fort Belvoir, VA

Relocation Assistance: None available at this time

Remote/Telework: NO - Not available for this position

Clearance Type: DoW Secret

Shift: Day shift

Travel Required: Up to 10% of the time

As the Network Design Engineering Architect / Lead for the Next Generation Environment (NGE) on the Integrated Research and Development for Enterprise Solutions (IRES) contract, you will serve as the principal network authority and Lead Network Integrator driving the architecture, modernization, and cross-performer technical governance of the Missile Defense Agency’s (MDA) unified digital ecosystem.

In this high-visibility role, you will lead a dedicated team of network engineers and act as the primary interface between the Government NGE Technical Director, Government Network Design Lead, MDA leadership, and industry partners within the multi-contractor program consortium. You will establish and enforce technical baselines across Cisco Nexus Spine-Leaf EVPN-VxLAN fabrics, VMware NSX software-defined networks, Versa SD-WAN WAN/edge transport, F5 application delivery controllers, and Infoblox enterprise DDI bridging on-premises and hybrid multi-cloud (AWS/Azure GovCloud/IL5/IL6/IL7) environments.

Consortium & Stakeholder Integration:

• Serve as the Lead Network Integrator across the program enterprise; align network technical roadmaps and Interface Control Documents (ICDs) among government stakeholders, military leadership, and multiple industry performers/teammate companies.

Government & Technical Advisory:

• Serve as direct technical advisor to the Government NGE Technical Director and Government Network Design Lead; translate mission capability needs into actionable network architecture roadmaps, technical baseline decisions, and engineering trade studies.

Team Leadership & Engineering Oversight:

• Oversee, guide, and mentor a multidisciplinary team of network design and implementation engineers; manage technical task assignments, design reviews, peer code/config audits, and engineering deliverables.

Data Center & Fabric Architecture:

• Architect scalable multi-site Data Center fabrics utilizing Spine-Leaf topologies, Cisco Nexus (NX-OS) platforms, and EVPN-VxLAN overlay technologies; integrate with VMware NSX / VMware Cloud Foundation (VCF) to establish software-defined networking and distributed micro-segmentation.

Application Delivery & Traffic Management:

• Design enterprise load balancing, traffic distribution, and SSL offloading/decryption architectures using F5 BIG-IP (LTM/GTM/APM); establish high-availability application routing across hybrid cloud boundaries.

Edge, WAN & SD-WAN Architecture:

• Architect resilient WAN transport and secure branch interconnects leveraging Versa Networks SD-WAN/SASE solutions, MPLS, and zero-trust edge boundary controls.

DDI & IPAM Strategy:

• Govern enterprise IP address management, automated DNS resolution, and DHCP provisioning frameworks utilizing Infoblox DDI integrated with hybrid cloud orchestration pipelines.

Zero Trust & Security Architecture:

• Define network segmentation, micro-segmentation, ICAM integration, dynamic policy enforcement (802.1X/NAC), and FIPS-validated cryptography (IPsec/MACsec); align designs with DoW Zero Trust Strategy, NIST SP 800-53, and DISA STIGs to support continuous ATO (cATO).

Governance, MBSE & ARB Leadership:

• Lead Network Architecture Review Boards (ARB) and Engineering Change Boards; establish authoritative High-Level Designs (HLD), Low-Level Designs (LLD), Architecture Decision Records (ADRs), and Interface Control Documents (ICDs) leveraging Model-Based Systems Engineering (MBSE) concepts.

The successful candidate will:

• Have excellent communication skills with the ability to brief senior leaders and translate technical concepts into mission impact.

The selected candidate may be assigned as an employee for one of our teammate companies.

Basic Requirements:

• Must have 12, or more, years of general (full-time) work experience
• May be reduced with completion of advanced education
• Must have 6, or more, years of directly related experience designing and leadinglarge-scaleenterprise orDoWnetworks across data center, WAN/backbone, campus/branch domains.
• Must have 1, or more, years of experience working in a management or leadership role
• Must have expertlevel knowledge of routing and switching (BGP, OSPF, IS IS), EVPN VXLAN and/or MPLS, QoS, IPv6, multicast, and network resiliency patterns.
• Must have demonstrated success implementing Zero Trust segmentation, 802.1X/NAC, identity awarefirewallpolicy, and FIPS validated cryptography.
• Must be familiary with hybrid/multi cloud networking patterns and IL4/5/6 operational constraints; strong grasp of RMF/STIG compliance.
• Must have a current IAT III or IAM II baseline certification (examples: CISSP, CASP+ CE, CISM).
• Must have an active DoW Secret Security Clearance

Desired Requirements:

• Have, or obtain, an active DoW Top Secret Security Clearance with SCI eligibility
• Have a Bachelor’s degree (or higher) in computer science, Information Technology
• Have experience performing within ITIL, TOGAF, or other architecture frameworks.
• Have experience supporting the Missile Defense Agency (MDA) or otherDoWorganizations.
• Have experience with software-defined networking (SDN), automation, and cross-domain solutions.

DesiredCertifications:

• CCIE (Enterprise Infrastructure, Security, or Data Center)
• CCNP (Enterprise, Service Provider, or Security) or equivalent expert credentials (JNCIE, NSE 7/8, PCNSE).
• ITIL® 4 Foundation (service alignment) and an architecture framework credential (TOGAF/DoDAFfamiliarity).
• Cloud networking foundations (e.g., AWS/Azure associate level) helpful for hybrid designs.

This position will be posted for a minimum of 3 days. If a candidate has not been selected at that time, it will continue to be posted until a suitable candidate is selected or the position is closed.

Compensation Details:

$175,000 – $225,000

The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.

Benefits Overview:

• Health, dental, and vision insurance
• Paid time off and holidays
• Retirement benefits (including 401(k) matching)
• Educational reimbursement
• Parental leave
• Employee stock purchase plan
• Tax-saving options
• Disability and life insurance
• Pet insurance

Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.

Original Posting:

10/08/2026 - 10/19/2026

Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed, marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.