Systems: Network Reliability Engineer (43325FF)

Referment; New York (NY); On-site; USD 140,000 - 180,000; Full time

Job summary

Referment is seeking a Network Reliability Engineer to join a cross-platform infrastructure team responsible for the reliability of a complex production environment spanning Linux, Windows, and high‑performance networks.

The role combines operational ownership with engineering projects: incident resolution, observability improvements, automation of repetitive tasks, and safe change management across Palo Alto, Fortinet, Cisco ASA, and cloud networking.

Qualifications

• 5+ years of hands-on experience operating and engineering production networks at scale.

Responsibilities

• Operate and engineer production network infrastructure for stability and safe change.

Skills

Network engineering

On-call responsibilities

Troubleshooting under pressure

Networking protocols

Observability

Automation

Python scripting

Education

Technical degree or equivalent

CCNP

PCNSE

Tools

Ansible

Zscaler ZIA/ZPA

Palo Alto

Fortinet

Cisco ASA

Splunk

SolarWinds

Zabbix

Python

Job description

Referment is working with an investment and technology organisation seeking a Network Reliability Engineer for a hands-on infrastructure engineering role.

You will join a cross-platform systems team responsible for the reliability and continuing improvement of a complex production environment spanning Linux and Windows systems, business applications, high-performance networks and storage infrastructure. The remit combines operational ownership with engineering projects: resolving difficult incidents, improving observability, automating repetitive work and making changes safely.

The Role

• Operate and engineer production network infrastructure with a focus on stability, reliability and safe change.
• Diagnose unfamiliar, high-impact technical problems under pressure with high attention to detail.
• Administer network, monitoring and security platforms across a cross-platform environment, with a focus on Palo Alto, Fortinet and Cisco ASA.
• Develop automation using industry-standard frameworks to remove manual work, improve efficiency and manage configuration as code.
• Implement and maintain Zero Trust architecture and secure access solutions such as Zscaler (ZIA/ZPA), Cisco ISE or FortiNAC.
• Make network health measurable through effective metrics, monitoring and diagnostic tooling including Splunk, SolarWinds and Zabbix.
• Contribute to broader infrastructure engineering projects, including cloud-native networking and hybrid connectivity.

What We're Looking For

• At least five years of hands-on experience operating and engineering production networks at scale, including on-call responsibility.
• Strong fundamentals across UDP, TCP/IP, BGP and OSPF, with working knowledge of PIM and IGMP multicast technologies.
• Extensive hands-on experience with modern enterprise firewall and security platforms, specifically Palo Alto, Fortinet and Cisco ASA.
• Proficiency in industry-standard network automation and declarative configuration management tools, specifically Ansible.
• Experience writing and maintaining automation, ideally using Python.
• Hands-on experience with Zero Trust architecture and secure access solutions (e.g. Zscaler ZIA/ZPA, Cisco ISE, FortiNAC).
• Experience with standard network observability and monitoring suites such as Splunk, SolarWinds or Zabbix.
• A technical degree or equivalent professional experience.
• Relevant industry certifications such as CCNP or PCNSE are highly desirable.
• Experience with cloud-native networking and hybrid connectivity, such as AWS VPC, Direct Connect or Azure Networking, is a plus.

This could suit a senior network engineer, network automation engineer, network-focused site reliability engineer, or infrastructure engineer who has owned large production networks.

#Referment