Senior IP Network Expert responsible for designing, securing, and evolving a custom-built IP network infrastructure We are seeking a Senior IP Network Expert.This role requires a highly experienced professional with strong IP networking expertise and experience in cloud-based security technologies, particularly firewalling. This position is ideal for someone who is hands-on, team-oriented, humble, and willing to contribute at all levels, from architecture and design to operational and administrative tasks. Our network setting is unique: it is not an off-the-shelf solution. It has been internally built and integrated over time. The right candidate must be open-minded and willing to learn and understand this custom architecture before proposing improvements.
Key Responsibilities
Provide senior-level expertise in IP network architecture and operations
Design, maintain, and optimize IP network infrastructure
Support cloud-based networking and firewall/security technologies
Analyze and understand a custom-built network environment
Contribute ideas and improvements while respecting existing architecture
Perform hands-on operational and administrative tasks as needed
Collaborate with cross-functional teams to ensure reliability, security, and performance
Must-Haves
10 years of experience in IP networking (senior-level experience)
Strong understanding of core networking principles (routing, switching, TCP/IP fundamentals)
Experience with cloud-based networking technologies
Experience with firewalling and network security solutions
Ability and willingness to perform both high-level and hands-on technical work
Strong analytical and problem-solving skills
Nice-to-Haves
Experience working in highly customized or internally built network environments
Experience contributing to network architecture evolution or transformation initiatives
Exposure to hybrid or cloud-integrated network infrastructure




Position Overview
We are seeking a Senior IP Network Expert.This role requires a highly experienced professional with strong IP networking expertise and experience in cloud-based security technologies, particularly firewalling. This position is ideal for someone who is hands-on, team-oriented, humble, and willing to contribute at all levels, from architecture and design to operational and administrative tasks. Our network environment is unique: it is not an off-the-shelf solution. It has been internally built and integrated over time. The right candidate must be open-minded and willing to learn and understand this custom architecture before proposing improvements.
Key Responsibilities
Provide senior-level expertise in IP network architecture and operations
Design, maintain, and optimize IP network infrastructure
Support cloud-based networking and firewall/security technologies
Analyze and understand a custom-built network environment
Contribute ideas and improvements while respecting existing architecture
Perform hands-on operational and administrative tasks as needed
Collaborate with cross-functional teams to ensure reliability, security, and performance
Must-Haves
10 years of experience in IP networking (senior-level experience)
Strong understanding of core networking principles (routing, switching, TCP/IP fundamentals)
Experience with cloud-based networking technologies
Experience with firewalling and network security solutions
Ability and willingness to perform both high-level and hands-on technical work
Strong analytical and problem-solving skills
Nice-to-Haves
Experience working in highly customized or internally built network environments
Experience contributing to network architecture evolution or transformation initiatives
Exposure to hybrid or cloud-integrated network infrastructure
Disclaimer:
AI may be used in evaluating candidates.
This posting is for an existing vacancy.

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📌 Senior IP Network Expert responsible for designing, securing, and evolving a custom-built IP network (Ontario)
🏢 S.I. Systems
📍 Ontario