Network Engineer, Mobile Core Network Services 

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Job Title: Network Engineer, Mobile Core Network Services

Location: Bellevue, Washington 98004

Onsite/Remote: Onsite (5 days/week) (Local Candidates)

Previous Cisco Experience Required: Needs to be extremely well-versed in all things Cisco / Cisco products

Position Overview/Role Summary:

Client is seeking an experienced Network Engineer to support testing, deployment, upgrades, and operational optimization within a mobile core networking environment. This role will focus on validating network solutions, supporting production implementations, consulting on network design, and providing technical expertise during large-scale network initiatives. The ideal candidate brings strong hands-on experience with mobile core technologies, network testing methodologies, and production network support.

Responsibilities:

• Provide technical guidance and advisory support for network enhancements, infrastructure upgrades, and architecture improvements.

• Collaborate with stakeholders to understand testing objectives, technical requirements, and business goals.

• Develop, execute, and document network test plans and communicate results through professional reporting.

• Support the design, implementation, and validation of laboratory environments, feature enhancements, and infrastructure upgrades.

• Create migration documentation and support activities associated with transitioning solutions from laboratory environments into production.

• Provide technical insight during escalation activities and collaborate with support organizations to accelerate service restoration.

• Consult on network architecture with emphasis on resiliency, scalability, performance, and service quality.

• Review and assess proposed network changes for risk, impact, and implementation readiness.

• Support major deployment events and assist with troubleshooting hardware and configuration issues.

• Share technical knowledge through documentation, informal training sessions, and knowledge transfer activities.

• Participate in recurring customer meetings, service reviews, and operational planning discussions.

• Contribute to operational reporting, risk assessments, and future planning activities.

Required Qualifications:

• Experience supporting mobile core network environments, including packet core technologies.

• Strong understanding of 5G networking concepts and call flow analysis.

• Experience developing and executing structured network testing plans.

• Ability to create technical documentation, including test reports, implementation plans, migration guides, and operational reports.

• Experience supporting production network deployments and infrastructure upgrade activities.

• Knowledge of network design principles including resiliency, scalability, fault recovery, and Quality of Service.

• Experience evaluating implementation procedures and conducting change impact assessments.

• Strong troubleshooting skills for network hardware, software, and configuration issues.

• Excellent verbal and written communication skills.

• Ability to work onsite during standard business hours (8 AM - 5 PM)

• Ability to participate in after-hours deployment activities and respond to critical incidents when required.

Preferred:

• Experience working within large enterprise or service provider network environments.

• Experience supporting laboratory to production migration initiatives.

• Previous experience delivering technical workshops, training sessions, or knowledge transfer activities.

• Industry certifications related to networking or telecommunications.

• Experience participating in customer-facing technical reviews and operational governance meetings.

Tools & Technologies:

• Cisco Enhanced Packet Core

• 5G Mobile Networks

• Network Testing and Validation Tools

• Packet Analysis and Troubleshooting Tools

• Network Monitoring Platforms

• Technical Documentation Tools

• Change Management Processes

Working Conditions

• Standard business hours coverage, 5 days per week; occasional overtime coverage may be required and must be approved.

• Onsite presence required; unplanned/unscheduled absences are not permitted without prior formal notice and approval.

• Planned absences (e.g., vacation) require advance written approval to avoid resource overlap.

Ready to take the next step?

If you’re excited about this role and ready to grow with a team that values ambition, ideas, and impact — we’d love to hear from you.

👉 Apply now and start building your journey with Vailexa.