Sr. Engineer Network Administration

OnX; Toronto; On-site; CAD 50,000 - 90,000; Full time

Job summary

OnX is seeking a Senior Engineer - Network Administration to join the Infrastructure Management team in Toronto. You will design, administer, and optimize enterprise networks across LAN/WAN, firewalls, VPNs, and cloud-connected environments to ensure secure, resilient operations.

You will collaborate with IT Security, NOC, and service providers to maintain high performance, implement upgrades, and document all configurations and procedures.

Qualifications

• 6-8 years of experience in Network Administration, Network Engineering, or Infrastructure Support.
• Minimum 5+ years managing enterprise networking environments.
• Experience supporting mission-critical network infrastructure in corporate or managed services environments.

Responsibilities

• Administer, monitor, and maintain enterprise network infrastructure across multiple locations.
• Configure and support routers, switches, firewalls, VPNs, wireless controllers, and load balancers.
• Troubleshoot networks, manage incidents, and perform root cause analysis for complex issues.
• Implement network upgrades, patching, changes, and infrastructure improvements via change management.
• Monitor bandwidth, performance, latency, packet loss, and capacity utilization.
• Collaborate with IT Security, NOC, infrastructure teams, vendors, and service providers to improve service delivery.
• Support resilience initiatives including failover testing, DR readiness, and security hardening.
• Maintain accurate network documentation including diagrams and SOPs.
• Ensure compliance with security policies, audits, and operational standards.
• Mentor junior engineers and contribute to automation initiatives.

Skills

Cisco Routing & Switching

ITIL based operations

LAN/WAN Administration

Network Monitoring

Firewall Management

VPN

TCP/IP

DNS/DHCP

Network Security Fundamentals

Education

Bachelor's Degree in Engineering, Computer Science, Information Technology, Electronics, Telecommunications, or related field

CCNA / CCNP / Palo Alto Certifications / ITIL or equivalent

Tools

SolarWinds

Prisma Cloud

Job description

OnX is a leading Canadian technology solutions provider helping organizations modernize, secure, and optimize their IT environments. We partner with clients across industries to deliver innovative infrastructure, cloud, security, and managed services solutions that drive business success.

About the Role

We are seeking a highly skilled Senior Engineer - Network Administration to join our Infrastructure Management team. In this role, you will be responsible for designing, administering, supporting, and optimizing enterprise network environments that enable secure, resilient, and high-performing business operations.

You will work across LAN, WAN, wireless, firewall, VPN, and cloud-connected environments while partnering with infrastructure, security, service delivery, and operational teams to ensure network stability, performance, and compliance

What You'll Do

• Administer, monitor, and maintain enterprise network infrastructure across multiple locations.
• Configure and support routers, switches, firewalls, VPNs, wireless controllers, and load balancers.
• Perform network troubleshooting, incident management, and root cause analysis for complex issues.
• Implement network upgrades, patching, configuration changes, and infrastructure improvements through established change management processes.
• Monitor bandwidth utilization, network performance, latency, packet loss, and capacity utilization.
• Collaborate with IT Security, NOC, infrastructure teams, vendors, and service providers to resolve issues and enhance service delivery.
• Support network resilience initiatives including failover testing, backup validation, disaster recovery readiness, and security hardening.
• Maintain accurate network documentation including diagrams, inventories, SOPs, and operational procedures.
• Ensure compliance with security policies, audit requirements, and operational standards.
• Mentor junior engineers and contribute to continuous improvement and automation initiatives.

Required Qualifications

Experience

• 6-8 years of experience in Network Administration, Network Engineering, or Infrastructure Support.
• Minimum 5+ years of hands-on experience managing enterprise networking environments.
• Strong experience supporting mission-critical network infrastructure in a corporate or managed services environment.

Technical Skills

Must Have:

• Cisco Routing & Switching
• ITIL-based operational practices
• LAN/WAN Administration
• Network Monitoring & Troubleshooting
• Firewall Management
• Routing & Switching Technologies
• TCP/IP, VPN, DNS, DHCP, and Network Security Fundamentals

Preferred Skills:

• Cisco Proxy Solutions
• Prisma Cloud
• SolarWinds Monitoring Solutions
• High Availability and Disaster Recovery Networking

Education

• Bachelor's Degree in Engineering, Computer Science, Information Technology, Electronics, Telecommunications, or a related field.
• Relevant networking certifications such as CCNA, CCNP, Palo Alto Certifications, ITIL, or equivalent are highly preferred.

Success in This Role

The ideal candidate will demonstrate:

• Strong analytical and troubleshooting skills.
• Excellent communication and stakeholder management abilities.
• Experience working within SLA-driven environments.
• Ability to balance operational excellence with continuous improvement initiatives.
• Strong collaboration skills across cross-functional technical teams

Why Join Us?

Join a technology services organization that specializes in cloud, networking, and security solutions across managed and professional services. We foster a collaborative, growth-oriented environment where innovation, learning, and career development are highly valued. You'll have the opportunity to work with enterprise-scale technologies while contributing to meaningful business outcomes

$50,000 – $90,000 base salary (not including bonus or commission)

“The compensation range in this posting reflects the Company’s good‑faith estimate at the time of publication. The applicable base pay range for any individual will be determined based on the candidate’s designated primary work location as well as factors including role scope and responsibilities, required qualifications, and the individual’s experience, education, skills, knowledge, and performance. Certain positions may also be eligible for additional compensation such as discretionary merit increases, bonuses, or sales‑based variable compensation in accordance with applicable plans and role requirements.

Diversity & Inclusion

OnX is an equal opportunity employer committed to creating an inclusive environment for all employees. We celebrate diversity and are dedicated to fostering a workplace where everyone can thrive regardless of race, religion, gender, age, disability, sexual orientation, or any other protected characteristic.