Senior Network Architect/Engineer

Position Description & Qualifications

Serco is seeking to fill a fast-paced, growing, and dynamic role of a highly skilled and experienced Senior Network Architect/Engineer to join our team. This critical role requires deep expertise in designing, deploying, operating, and troubleshooting complex enterprise network infrastructures across various system boundaries. Furthermore, you will be instrumental in establishing and managing robust network deployment environments crucial for validating configurations, ensuring network reliability during upgrades, and verifying the effectiveness of new security measures or applications before they go live.

The ideal candidate possesses strong leadership potential, advanced technical knowledge across various networking technologies, especially with Cisco devices with proven track record in successful deployment projects, and experience building scalable and repeatable test labs. This position is pivotal in ensuring our network remains secure, resilient, high-performing, and adaptable to evolving business needs.

As a Senior Network Architect/Engineer, you will:

- Lead or contribute significantly to the design of enterprise-scale networks (core, distribution, access layers), considering redundancy, security, scalability, performance, and cost-effectiveness.  Networks will be a mix of on-prem, enterprise data centers, and cloud-based environments.
- Develop network architectures for new projects, sites and technologies upgrades, and expansion programs.
- Adapt network designs as needed to interface with networks of other systems while ensuring overall network performance.
- Ensure alignment with business requirements, IT strategy, and regulatory compliance.
- Lead complex network deployments (new site builds, data center migrations, major infrastructure changes) from inception to completion following established methodologies (e.g., Change Management).
- Develop and implement detailed deployment plans including timelines, resource allocation, rollback strategies, and contingency planning.
- Adapt network interface designs for site and/or interface specific needs and updating necessary documentation.
- Troubleshoot and resolve intricate network issues during pre-deployment testing and post-deployment validation phases.
- Oversee the configuration, integration, and testing of hardware (routers, switches, firewalls) and software components (OSs, routing protocols, security policies).
- Design, build, maintain, and continuously improve network testing environments (labs) to accurately simulate production networks.
- Utilize appropriate tools for comprehensive validation of network configurations, security policies (pen testing environments), performance benchmarks, and failure scenarios.
- Assist the CyberSecurity team with evaluating security controls related to network architecture and performance.
- Ensure test labs are available for various teams: Network Engineers (new config/upgrade checks), Security Teams (vulnerability scanning, penetration testing), Application Teams (application compatibility testing).

To be successful in this role, you will have:

- Bachelors degree in a related field.
- 10 years of relevant experience including experience designing/architecting networks.
- An active DoD Secret security clearance.
- IAT level 1 Certification.
- Expert-level understanding of TCP/IP stack (IPv4/IPv6), BGP, OSPF, EIGRP routing protocols.
- Experience configuring and troubleshooting Cisco routers, switches, firewalls (especially ISR, ASR platforms; Catalyst series; ASA/Firepower).
- Strong experience with network address translation (NAT/PAT) and firewall technologies.
- Understanding of VLANs, STP variants (RSTP/MSTP), MSTP, VRRP/HSRP/NSHARP, BFD for fast convergence.
- Experience with network hardware vendors beyond Cisco (e.g., Juniper, Arista, Fortinet).
- Familiarity with network security concepts and tools (IPS, Firewalls, VPNs).
- Strong experience in setting up, managing, and using complex network test labs.
- Ability to travel 25%, CONUS and OCONUS.

Additional desired experience:

- Master's degree.
- Network+ or Security+ certification.
- Understanding of data center technologies like EVPN/VXLAN or traditional VLANs.
- Familiarity with VMWare and similar products.  Familiarity with Nutanix.
- Highly analytical, meticulous, and detail-oriented.
- Excellent communication skills, both written and verbal – must be able to articulate complex technical problems clearly.
- Strong organizational skills with the ability to manage multiple projects simultaneously in a fast-paced environment.
- Ability to work effectively under pressure, meet tight deadlines, and handle ambiguity.
- Willingness to mentor junior engineers and lead network teams.
- Proven success working with a geographically separated team.

If you are interested in working with a dedicated Serco team, then submit your application now for immediate consideration. It only takes a few minutes!

Company Overview

Serco Inc. (Serco) is the Americas division of Serco Group, plc. In North America, Serco’s 9,000+ employees strive to make an impact every day across 100+ sites in the areas of Defense, Citizen Services, and Transportation. We help our clients deliver vital services more efficiently while increasing the satisfaction of their end customers. Serco serves every branch of the U.S. military, numerous U.S. Federal civilian agencies, the Intelligence Community, the Canadian government, state, provincial and local governments, and commercial clients. While your place may look a little different depending on your role, we know you will find yours here. Wherever you work and whatever you do, we invite you to discover your place in our world. Serco is a place you can count on and where you can make an impact because every contribution matters.

To review Serco benefits please visit: https://careers.serco-na.com/us/en/what-we-offer . If you require an accommodation with the application process please email: [email protected] or call the HR Service Desk at 800-628-6458, option 1. Please note, due to EEOC/OFCCP compliance, Serco is unable to accept resumes by email.

Candidates may be asked to present proof of identity during the selection process. If requested, this will require presentation of a government-issued I.D. (with photo) with name and address that match the information entered on the application. Serco will not take possession of or retain/store the information provided as proof of identity. For more information on how Serco uses your information, please see our Applicant Privacy Policy and Notice.

Serco does not accept unsolicited resumes through or from search firms or staffing agencies without being a contracted approved vendor. All unsolicited resumes will be considered the property of Serco and will not be obligated to pay a placement or contract fee. If you are interested in becoming an approved vendor at Serco, please email [email protected] .

Serco is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, and other legally protected characteristics.

Pay Transparency

Our Total Rewards package includes competitive pay, performance-based incentives, and benefits that promote well-being and work-life balance—so you can thrive both professionally and personally. Eligible employees also gain access to a wide range of benefits from comprehensive health coverage and health savings accounts to retirement plans, life and disability insurance, and time-off programs that support work-life balance. Program availability may vary based on factors such as contract type, location, hire date, and applicable collective bargaining agreements.

Salary range: The range for this position can be found at the top of this posting. This range is provided as a general guideline and represents a good faith estimate across all experience levels. Actual base salary will be determined by a variety of factors, including but not limited to, the scope of the role, relevant experience, job-related knowledge, education and training, key skills, and geographic market considerations. For roles available in multiple states, the range may vary to reflect differences in local labor markets. In addition to base salary, eligible positions may include other forms of compensation such as annual bonuses or long-term incentive opportunities.
Benefits – Comprehensible benefits for full-time employees (part-time employees receive a limited package tailored to their role):

Medical, dental, and vision insurance
Robust vacation and sick leave benefits, and flexible work arrangements where permitted by role or contract
401(k) plan that includes employer matching funds
Tuition reimbursement program
Life insurance and disability coverage
Optional coverages that can be purchased, including pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection
Birth, adoption, parental leave benefits
Employee Assistance Plan

To review all Serco benefits please visit: https://careers.serco-na.com/us/en/about-us .

Serco complies with all applicable state and local leave laws, including providing time off under the Colorado Healthy Families and Workplaces Act for eligible Colorado residents, in alignment with our policies and benefit plans. The application window for this position is for no more than 60 days. We encourage candidates to apply promptly after the posting date, as the position may close earlier if filled or if the application volume exceeds expectations. Please submit applications exclusively through Serco’s external (or internal) career site. If an applicant has any concerns with job posting compliance, please send an email to: [email protected] .