Systems: Network Reliability Engineer (8231FDC)

Referment; New York (NY); On-site; USD 150,000 - 190,000; Full time

Job summary

Referment seeks a senior Network Reliability Engineer to own and improve a large-scale production network across Linux/Windows, with emphasis on stability and safe changes. You’ll tackle complex incidents, implement automation, and advance observability and security posture.

You will work in a cross-platform team, handling network automation, firewall platforms (Palo Alto, Fortinet, Cisco ASA), and secure access solutions like Zscaler and Cisco ISE, while collaborating on cloud networking

Qualifications

• 5+ 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 practical network engineering.
• Hands-on experience with modern enterprise firewall and security platforms (Palo Alto, Fortinet, Cisco ASA).
• Proficiency with industry-standard automation and declarative configuration management tools (Ansible).
• Experience writing automation (Python).
• Zero Trust architecture and secure access solutions (Zscaler ZIA/ZPA, Cisco ISE, FortiNAC).
• Observability/monitoring experience (Splunk, SolarWinds, Zabbix).
• Certifications such as CCNP or PCNSE are desirable.

Responsibilities

• Operate and engineer production network infrastructure with focus on stability and safe changes.
• Diagnose high-impact issues under pressure with strong attention to detail.
• Administer network, monitoring and security platforms across cross-platform environment.
• Develop automation to remove manual work and manage configuration as code.
• Implement and maintain Zero Trust architecture and secure access solutions.
• Make network health measurable through metrics and diagnostic tooling.
• Contribute to cloud-native networking and hybrid connectivity projects.

Skills

Network fundamentals

On-call experience

Python

Education

Technical degree or equivalent experience

Tools

Ansible

Palo Alto

Fortinet

Cisco ASA

Cisco ISE

Zscaler

Splunk

SolarWinds

Zabbix

AWS VPC

Direct Connect

Azure Networking

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.

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