ZipRecruiter

Log In

1

Senior Cs Core Network Engineer Jobs in California

Aspire Fiber

Senior Core Network Engineer

Moorpark, CA · On-site

$130K - $150K/yr

Position Summary We are seeking a highly experienced Senior Core Network Engineer to lead the design, implementation, and optimization of our carrier-grade IP/MPLS and FTTH network infrastructure.

Goldstone Partners, Inc.

Network Engineer

Sunnyvale, CA · On-site

$120K - $150K/yr

You have demonstrated experience in classified network environments, a solid command of core ... If you're ready to put your network engineering skills to work on a mission that matters, let ...

NTENT

Senior Network Engineer

Carlsbad, CA · On-site

$106K - $146K/yr

By virtue of the technical team's size and composition, Core responsibilities for wired, wireless ... Senior level is preferred * Solid background in network administration, engineering, and ...

NTENT

Senior Network Engineer

Carlsbad, CA

$106K - $146K/yr

Operations, the Senior Network Engineer is responsible for designing, managing, and supporting all ... By virtue of the technical team's size and composition, Core responsibilities for wired, wireless ...

next page

Showing results 1-20

All JobsCs Core Network Engineer JobsSenior Cs Core Network Engineer JobsSenior Cs Core Network Engineer Jobs in California

Senior Cs Core Network Engineer information

What is a Senior CS Core Network Engineer?

Senior CS Core Network Engineers are experienced professionals who design, implement, and maintain the core elements of a telecommunications network, specifically the Circuit Switched (CS) core. They ensure reliable voice and data communication by managing network components such as MSCs (Mobile Switching Centers), HLRs (Home Location Registers), and gateways. Their responsibilities also include troubleshooting, optimizing network performance, integrating new technologies, and supporting large-scale network upgrades. Typically, these engineers work closely with other network teams and vendors to maintain service quality and network security.

How does a Senior CS Core Network Engineer typically collaborate with cross-functional teams during network upgrades or optimizations?

As a Senior CS Core Network Engineer, you will frequently collaborate with teams such as radio network engineers, transmission specialists, and IT support during network upgrades or optimization projects. This collaboration involves joint planning sessions, troubleshooting calls, and integrating solutions to ensure seamless voice and data services. You’ll often act as a technical lead, coordinating with vendors and internal stakeholders to implement changes with minimal service disruption. Effective communication and documentation are key, as you’ll need to translate complex core network requirements into actionable tasks for other teams.

What are the key skills and qualifications needed to thrive as a Senior CS Core Network Engineer, and why are they important?

To thrive as a Senior CS Core Network Engineer, you need deep expertise in mobile core network architecture, signaling protocols (such as SS7, SIP, and Diameter), and a relevant engineering degree. Experience with core network equipment (e.g., Ericsson, Huawei, Nokia), network monitoring tools, and certifications like CCNP or vendor-specific credentials are typically required. Strong analytical thinking, problem-solving abilities, and effective communication help you collaborate with cross-functional teams and troubleshoot complex issues. These skills ensure reliable network performance, rapid resolution of outages, and the successful implementation of new services in telecom environments.

What is the difference between Senior Cs Core Network Engineer vs Network Operations Center (NOC) Engineer?

AspectSenior Cs Core Network EngineerNetwork Operations Center (NOC) Engineer
CertificationsCCNA, CCNP, Cisco certificationsCCNA, Network+
Work EnvironmentDesign, optimize, and troubleshoot core network infrastructureMonitor, maintain, and support network systems
Industry UsageTelecommunications, ISPs, large enterprisesTelecom providers, managed service providers

The Senior Cs Core Network Engineer focuses on designing and maintaining core network infrastructure, requiring advanced certifications and technical expertise. In contrast, a Network Operations Center (NOC) Engineer primarily monitors and supports existing networks, often working in a 24/7 environment. Both roles are vital in telecommunications and large enterprise networks but differ in scope and responsibilities.

What are the most commonly searched types of Cs Core Network Engineer jobs in California? The most popular types of Cs Core Network Engineer jobs in California are:
What cities in California are hiring for Senior Cs Core Network Engineer jobs? Cities in California with the most Senior Cs Core Network Engineer job openings:
Senior Cs Core Network Engineer jobs near you

Senior Core Network Engineer

Aspire Broadband Holdings Inc

Moorpark, CA

$130K - $150K/yr

Other

Medical, Dental, Vision, Life, PTO

Re-posted 3 days ago

Job description

Description

Position Summary


We are seeking a highly experienced Senior Core Network Engineer to lead the design, implementation, and optimization of our carrier-grade IP/MPLS and FTTH network infrastructure. This role is critical to ensuring scalability, resiliency, and performance across our core, aggregation, and access networks.


The ideal candidate has deep experience operating within an Internet Service Provider (ISP) or telecommunications environment, with hands-on expertise in Adtran access platforms, Arista routing/switching, and large-scale FTTH deployments.


This is a senior-level technical role requiring both architectural leadership and advanced operational troubleshooting capability.

Key Responsibilities
Core Network Architecture & Engineering

  • Design, implement, and maintain high-availability IP/MPLS core networks.
  • Engineer scalable BGP-based edge and peering infrastructure.
  • Architect resilient L2/L3 topologies for aggregation and backbone layers.
  • Lead IPv4/IPv6 dual-stack strategy and deployment.

FTTH & Access Network Engineering

  • Design and support FTTH (Fiber-to-the-Home) GPON/XGS-PON environments.
  • Configure and manage Adtran OLTs, aggregation platforms, and access systems.
  • Support subscriber provisioning models and service delivery frameworks.
  • Collaborate with outside plant (OSP) and field engineering teams.

Routing & Switching (Arista Focus)

  • Deploy and support Arista switching and routing platforms in core and aggregation roles.
  • Implement EVPN/VxLAN where applicable.
  • Optimize traffic engineering, QoS, and multicast routing.

ISP Operations & Optimization

  • Support upstream providers, IX peering, and transit relationships.
  • Perform traffic capacity planning and bandwidth forecasting.
  • Lead root cause analysis of network outages and performance incidents.
  • Develop monitoring, alerting, and performance visibility standards.
  • Participate in Tier 3 escalation and on-call rotation.

Automation & Documentation

  • Drive automation initiatives (Python, Ansible, etc.).
  • Maintain accurate network diagrams, IP schema, and routing policies.
  • Develop operational runbooks and engineering standards.


  • Required Qualifications
    7-10+ years of experience in a carrier, ISP, or telecommunications environment.
    Extensive experience with:
         - Adtran platforms (OLT, aggregation, access equipment)
         - Arista switches and routers
         - FTTH architecture and subscriber networks
    Deep expertise in:
        - BGP (iBGP, eBGP, route reflectors)
        - OSPF and/or IS-IS
        - MPLS (L2VPN/L3VPN preferred)
        - VLAN, QinQ, QoS
        - Multicast (PIM)
    Experience with ISP edge routing and peering design.
    Strong troubleshooting skills in production networks serving large subscriber bases.
    Experience designing high-availability and redundant architectures.

Preferred Qualifications
Experience with GPON and XGS-PON design.
Familiarity with BRAS/BNG architectures.
Experience with subscriber management and AAA (RADIUS).
Knowledge of DDoS mitigation and ISP security best practices.
Experience with DWDM or transport integration.
Industry certifications:
    - CCNP/CCIE (Service Provider preferred)
    - Arista ACE
    - MEF or equivalent carrier certifications

Key Competencies

  • Carrier-grade design mindset
  • Strong understanding of ISP traffic patterns and subscriber behavior
  • Ability to operate in fast-growing network environments
  • Excellent documentation and cross-team communication skills
  • Leadership capability for mentoring junior engineers


Why Join Us?

  • Build and scale next-generation fiber infrastructure.
  • Work in a high-growth ISP environment.
  • Influence core network strategy.
  • Competitive compensation and benefits.
  • Medical, Dental, Vision, Long Term Disability, Short Term Disability and Voluntary Buy Up of Life Insurance
  • Paid time off
  • Parental Leave
  • Team Building events
  • Opportunity for technical leadership and career growth.

Apply