Senior Security Specialist – Threat Risk Assessment (TRA) Client: Supply Ontario | RQ00742 (Hybrid, Toronto, ON, Canada) We are hiring a Senior Security Specialist to lead enterprise Threat Risk Assessment (TRA) initiatives for Supply Ontario , supporting the assessment and enhancement of security across applications, infrastructure, business processes, and information systems.

The ideal candidate will have extensive experience in risk management frameworks, threat modeling, information security governance, compliance, and executive-level security reporting .

This opportunity is best suited for cybersecurity professionals with proven expertise in ISO 31000, NIST RMF, FAIR, STRIDE, PASTA, MITRE ATT&CK;, ISO 27001, NIST CSF, CIS Controls , and regulatory compliance within complex enterprise or public sector environments.

Role Snapshot

Requisition ID RQ00742 Job Title Senior Security Specialist Client Supply Ontario Work Location 525 University Avenue, Toronto, Ontario, Canada Work Arrangement Hybrid (Up to 3 days onsite at Hiring Manager's discretion) Start Date September 1, 2026 End Date March 31, 2027 Duration 151 Business Days Work Schedule 7.25 Hours per Day (5 Days/Week) Industry Public Sector Public Sector Experience Preferred

Position Overview

Supply Ontario is seeking a Senior Security Specialist to drive the end-to-end execution of Threat Risk Assessments (TRA) across enterprise systems, applications, infrastructure, and business processes. The successful consultant will identify threats, evaluate vulnerabilities, assess organizational risk, and recommend effective mitigation strategies while ensuring compliance with industry standards and regulatory requirements.

The role requires collaboration with technical teams, business stakeholders, and executive leadership to strengthen the organization's overall cybersecurity posture and support strategic security initiatives.

Key Responsibilities

- Threat Risk Assessment & Risk Management (40%)
- Lead comprehensive Threat Risk Assessment (TRA) engagements across enterprise environments
- Define assessment scope with business and technical stakeholders
- Conduct structured risk assessments using recognized frameworks, including:

- ISO 31000
- NIST Risk Management Framework (RMF)
- FAIR (Factor Analysis of Information Risk)
- Identify, evaluate, and prioritize threats, vulnerabilities, and organizational risks
- Maintain enterprise risk registers and monitor remediation activities
- Develop practical mitigation strategies aligned with business objectives




- Threat Modeling & Security Analysis (30%)
- Develop and apply threat models using methodologies such as:

- STRIDE

- PASTA
- MITRE ATT&CK;
- Review system architecture, application designs, and data flows
- Identify attack surfaces, threat vectors, and security weaknesses
- Perform security gap analysis against industry standards and best practices
- Assess confidentiality, integrity, and availability (CIA) risks across enterprise environments
- Security Governance, Compliance & Reporting (20%)
- Ensure alignment with organizational security policies and regulatory requirements
- Support compliance initiatives involving:

- ISO 27001

- NIST Cybersecurity Framework (CSF)

- CIS Critical Security Controls
- PHIPA (Personal Health Information Protection Act)
- Produce comprehensive TRA reports, executive summaries, and compliance documentation
- Present findings, risk ratings, and remediation recommendations to executive leadership
- Support internal audits and security governance initiatives

- Continuous Security Improvement (10%)
- Contribute to the evolution of enterprise risk management methodologies
- Monitor emerging cyber threats, vulnerabilities, and security trends
- Recommend improvements to organizational security controls and governance practices
- Collaborate across cross-functional teams to strengthen enterprise security capabilities

Required Skills & Experience Skill / Experience Required Experience Threat Risk Assessments (TRA) 5–7 Years ISO 31000 Risk Management 5–7 Years NIST RMF 5–7 Years FAIR Risk Framework 5–7 Years Threat Modeling (STRIDE, PASTA, MITRE ATT&CK;) 3–5 Years Security Governance 5+ Years ISO 27001 5+ Years NIST CSF 5+ Years CIS Critical Security Controls 5+ Years Risk Registers & Risk Reporting 5+ Years Executive & Technical Reporting 5+ Years Gap Analysis Required Risk Assessment Matrices Required Data Flow Diagrams Required Vulnerability Analysis Required Stakeholder Communication Required Regulatory Compliance (PHIPA) Required

Highly Desired Skills

- Enterprise security architecture assessments
- Security control maturity assessments




- Attack surface analysis
- Asset inventory and classification
- Vulnerability assessment tools (e.g., Nessus, OpenVAS)
- Executive-level cybersecurity presentations
- Security audit support
- Risk treatment planning
- Cybersecurity policy development
- Public sector security experience

Deliverables The Selected Consultant Will Be Responsible For Delivering

- Comprehensive Threat Risk Assessment (TRA) Reports
- Enterprise Risk Registers
- Threat Modeling Diagrams
- Risk Assessment Matrices
- Asset Inventory & Classification Documentation
- Vulnerability Assessment Reports
- Security Gap Analysis
- Mitigation & Remediation Plans
- Executive Summary Reports
- Compliance Mapping Documentation
- Executive Presentation Decks

Evaluation Criteria Category Weight Threat Modeling (STRIDE, PASTA, MITRE ATT&CK;) 20% Threat Risk Assessment (ISO 31000, NIST RMF, FAIR) 20% Security Gap Analysis & Architecture 20% Collaboration, Communication & Teamwork 30% Executive Reporting & Presentations 10%

Additional Assignment Information

- Hybrid work arrangement with onsite attendance (up to 3 days per week) as required by the Hiring Manager
- Agency-issued laptop will be provided
- Consultant must maintain a secure home office with hard-wired internet connectivity
- Agency systems and equipment must remain within the Province of Ontario unless prior written approval is obtained
- Assignment duration is 151 business days, with the possibility of extension based on project needs and Agency discretion

How to Apply If this opportunity aligns with your experience and qualifications, please submit the following mandatory documents to [email protected] by Monday, August 10, 2026, at 8:30 AM EST :

- Updated Resume (Word format) – Mandatory
- Skills Matrix and References – Mandatory
- Expected Hourly Rate – Mandatory
- Visa Status – Mandatory
- LinkedIn Profile URL – Mandatory

Significant: Applications submitted without all mandatory documents cannot be processed. Know someone who may be a good fit? Feel free to share this opportunity with experienced Senior Security Specialists, Cybersecurity Consultants, Information Security Analysts, Security Architects, Risk & Compliance Consultants, and Threat Risk Assessment (TRA) professionals with expertise in ISO 31000, NIST RMF, FAIR, STRIDE, PASTA, MITRE ATT&CK;, ISO 27001, NIST CSF, CIS Controls, PHIPA compliance, enterprise security governance, and public sector cybersecurity initiatives .

📌 Security Specialist - Senior (Toronto)
🏢 S M Software Solutions
📍 Toronto