Sr. Network & Cyber Security Architect to lead the design and platform strategy of a network, firewall, and cyber management transition
S.i. Systems
Calgary, AB-
Number of positions available : 1
- Salary To be discussed
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Contract job
- Published on December 15th, 2025
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Starting date : 1 position to fill as soon as possible
Description
Our large, enterprise Oil & Gas industry client is seeking a Sr. Network & Cyber Security Architect to lead the design and platform strategy of a network, firewall, and cyber management transition.
This is an initial 1-year contract with a possibility of extension. The successful candidate will be based in Calgary and agreeable to working full-time onsite (5 days/week).
Must-Haves:
- 8+ years in network/security architecture with 5+ years in firewall operations across enterprise environments
- Hands-on expertise with Cisco Firepower and Palo Alto platforms; proficiency with Cisco FMC and Panorama.
- Experience with designing network & firewall platforms adhering to cybersecurity (SIEM/ Defender/Sentinel/SOC/MDR) protocols.
- Solid background in network security fundamentals (L3/L4, NAT, VPN, IDS/IPS), packet-level troubleshooting, and change governance.
- Scripting/automation (e.g., Python) for telemetry transformation, policy automation, or QA.
Nice-to-Haves:
- Experience guiding transitions from Network-owned to Cyber-owned firewall services (RACI, knowledge transfer, pilot/parallel ops).
- Knowledge of OT/IT segmentation patterns and cloud-edge integration patterns.
- Exposure to SonicWall environments and tech-debt retirement planning.
Requirements
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