Senior Network Engineer - Remote USA

C4 Technical Services; Littleton (CO); Remote; USD 120,000 - 160,000; Part time

Job summary

C4 Technical Services seeks a Senior Network Engineer to design, implement, and operate large-scale ISP core networks. You will work across Juniper MX/EX and Arista EOS devices, handling Layer 3 routing, MPLS, and security architectures in a remote USA environment.

Responsibilities include building robust routing, configuring IS-IS/OSPF/BGP, and applying policy controls. Strong scripting and automation skills with Ansible and Python are required, along with mentoring teammates and documenting

Qualifications

• 7+ years of hands-on network engineering in large-scale service provider environments.
• Proven experience designing, implementing, and troubleshooting complex routed network solutions.
• Industry certifications such as JNCIP/JNCIE, Arista ACE, Fortinet FCP, CCNP or equivalent are desirable.

Responsibilities

• Core Network Engineering: Design, implement, and maintain complex Juniper and Arista network infrastructures for large ISP cores, edges and aggregation.
• IP Routing & MPLS: Configure and troubleshoot Layer 3 routing (IS-IS, OSPF, BGP), MPLS, and L3VPN VRF design.
• BGP Policy Control: Develop and implement BGP policies using policy statements, prefix lists, route maps and communities.
• Juniper Junos: Configure and manage Juniper MX/EX devices, VRFs, VPLS, IRB.
• Arista EOS: Deploy and manage Arista fabrics with VXLAN/EVPN, MLAG, CVP, ZTP, telemetry.
• Layer 2 & Redundancy: Configure VLANs, LAG/LACP, MLAG, STP, VRRP.
• Firewall & Security: Configure FortiGate policies, NAT, VPNs, and HA clusters in SP networks.
• Automation: Use Ansible and Python to automate config, deployments and routines.
• Troubleshooting, Documentation & Mentorship: Escalation point for incidents, maintain diagrams and SOPs, mentor juniors.

Skills

Juniper MX/EX series

Arista EOS

BGP/MPLS IS-IS OSPF

FortiGate firewalls

Linux scripting (Python)

Ansible automation

Network automation

Tools

Ansible

Python

Job description

Added - 11/09/26 Senior Network Engineer - Remote USA Telecom Littleton , CO | Contract Or

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• Pay Rate is Dependant on Experience Level
• Must haveNokia, Arista or Juniper experience.
• This role is ideal for an engineer who thrives on deep Layer 3 technical work, multi-vendor core platforms (Juniper + Arista + Nokia), and practical Linux-based automation in real ISP environments.

• Pay Rate is Dependant on Experience Level
• Must haveNokia, Arista or Juniper experience.
• This role is ideal for an engineer who thrives on deep Layer 3 technical work, multi-vendor core platforms (Juniper + Arista + Nokia), and practical Linux-based automation in real ISP environments.

Responsibilities

• Core Network Engineering: Design, implement, and maintain complex Juniper and Arista network infrastructures for large-scale ISP core, edge, and aggregation environments.
• IP Routing & MPLS: Configure and troubleshoot advanced Layer 3 routing, including IS-IS, OSPF, MP-BGP (route reflectors), MPLS (LDP, RSVP-TE, Segment Routing), and L3VPN VRF design.
• BGP Policy Control: Develop and implement BGP policy using policy statements, prefix lists, route maps, AS Path Prepending, local preference, MED, BGP communities, VRF import/export, and route aggregation.
• Juniper Junos: Expertly configure and manage Juniper MX and EX series devices, including routing instances (VRFs), VPLS, bridging, and IRB.
• Arista EOS: Deploy and manage Arista routing and leaf-spine fabrics, including VXLAN/EVPN, MLAG, CloudVision, ZTP, and network telemetry.
• Layer 2 & Redundancy: Configure and troubleshoot VLANs, LAG/LACP, MC-LAG/MLAG, STP, and VRRP.
• Firewall & Security: Configure and manage FortiGate firewalls, including security policies, NAT, VPNs, and HA clusters, and integrate them into routed service provider networks.
• Automation: Use Ansible and Python scripting to automate configuration, deployments, and routine network tasks.
• Troubleshooting, Documentation & Mentorship: Serve as a Tier 3 escalation point for complex incidents, maintain network diagrams and operational procedures, and mentor junior engineering staff.

Required skills

• In-depth, hands-on experience with Juniper MX and EX series and Arista EOS platforms in a service provider network.
• Expertise in Layer 3 routing protocols (IS-IS, OSPF, BGP) and MPLS services (L3VPN, L2VPN/VPLS, traffic engineering).
• Solid understanding of advanced BGP policy controls and filtering techniques.
• Hands-on experience configuring and supporting FortiGate firewalls.
• Proven experience with ISP core and edge architectures.
• Working knowledge of network automation (Ansible) and scripting, preferably Python.
• Experience with network monitoring, telemetry, and logging systems.
• Excellent problem-solving, communication, and collaboration skills.

Experience & Qualifications

• 7+ years of hands-on network engineering experience in a large-scale service provider environment.
• Proven experience designing, implementing, and troubleshooting complex routed network solutions.
• Relevant industry certifications are highly desirable (e.g., JNCIP/JNCIE, Arista ACE, Fortinet FCP, CCNP, or equivalent).