Our client in the public sector is seeking a Senior Security Architect to support the design and implementation of security architectures across a variety of enterprise initiatives.

Location: Hamilton, ON Duration: 4-5 month contract with possibility of extension.

Hybrid Work Model: 2 days/week in office (Tues/Weds) 35 hours/week Key Responsibilities: Act as the lead technical architect for security across infrastructure, network, and application-level projects.

Engage with internal project teams to understand needs and design fit-for-purpose security architectures .

Conduct assessments and provide recommendations across areas such as endpoint protection, firewalls, router and DMZ configuration, and data center security.

Design and advise on network security architecture , including Microsoft ecosystem tools and integrations (e.g., Crowd

Strike, Azure, Active Directory).

Provide expertise on application security , including secure API design and implementation.

Deliver comprehensive security architecture reports for each assigned project.

Assess current gaps such as lack of MFA and insecure API designs,



and recommend remediation strategies.

Collaborate with project managers and network teams to ensure architecture aligns with timelines and business goals.

Must Haves: Proven experience as a Security Architect with deep technical knowledge of enterprise security architecture.

Solid background in network security , including firewalls, routers, DMZs, and endpoint protection tools.

Experience designing security for large-scale Microsoft-based environments and integrations with third-party tools (e.g., Crowd

Strike).

Ability to deliver formal security design documentation and articulate risks and recommendations clearly.

Knowledge across multiple domains: infrastructure, data center security, network segmentation, application security , and identity/access management.

Hands-on experience with traditional architecture methods as well as modern, API-driven environments.

Strong communication skills and ability to engage both technical and non-technical stakeholders.

📌 Senior Security Architect to support Incident Response Efforts for our client in the Public Sector (Toronto)
🏢 S.i. Systems
📍 Toronto