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 Important: Applications submitted without all mandatory documents cannot be processed. Know someone who may be a positive 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