Sr. Engineer - Vulnerability Management

OnX Enterprise Solutions; Toronto; On-site; CAD 72,000 - 96,000; Full time

Benefits offered by this job

Professional development and cert."

Flexible work options

Competitive compensation and benefits

Job summary

OnX Enterprise Solutions in Toronto, Ontario is seeking a Sr. Engineer - Vulnerability Management to lead the vulnerability lifecycle across enterprise infrastructure, apps, cloud, and networks.

You will drive automation with Python and PowerShell, perform assessments, set risk-based prioritization, and collaborate with Infra, Cloud, Platform Eng, DevSecOps, SOC, and Applications teams to meet remediation SLAs.

Qualifications

• Bachelor's degree in Computer Science, Information Technology, Engineering, Telecommunications, or related technical field.
• Minimum 5+ years of hands-on experience in Vulnerability Management and Security Operations.
• Strong understanding of enterprise infrastructure, cloud security, DevSecOps, and remediation practices.

Responsibilities

• Manage the end-to-end vulnerability management lifecycle across OS, applications, cloud, containers, and networks.
• Perform vulnerability assessments across operating systems, applications, cloud platforms, containers, and network environments.
• Operate and optimize vulnerability scanning tools and security assessment frameworks.
• Drive automation initiatives using Python and PowerShell to improve remediation workflows and reporting.
• Analyze threat intelligence, exploit data, CVSS scores, and emerging vulnerabilities to support risk-based prioritization.
• Collaborate with Infrastructure, Cloud, Platform Engineering, DevSecOps, SOC, and Application teams to ensure remediation SLAs are achieved.
• Support security incidents by evaluating vulnerability impact, exploitability, and contributing to root cause analysis.
• Manage vulnerability exceptions, false-positive handling, and risk acceptance processes.
• Create executive-level reports and dashboards highlighting exposure trends and remediation progress.

Skills

Vulnerability Management

Security Automation

Cloud Security

DevSecOps

Threat Detection

Incident Response

Risk Prioritization

IAM

Data Protection

Vulnerability Remediation

Security Operations

Cross-functional Collaboration

Education

Bachelor's degree in Computer Science, Information Technology, Engineering, Telecommunications, or related field

Tools

Qualys VMDR

Microsoft Defender Vulnerability Management

Nessus

Rapid7

Python Scripting

PowerShell Scripting

Job description

OnX is a leading Canadian technology solutions provider helping organizations modernize, secure, and optimize their IT environments. We partner with clients across industries to deliver innovative infrastructure, cloud, security, and managed services solutions that drive business success.We are seeking a highly skilled Sr. Engineer - Vulnerability Management to join our growing Cybersecurity team. In this role, you will be responsible for identifying, assessing, prioritizing, and driving remediation of security vulnerabilities across enterprise infrastructure, applications, cloud environments, and networks.You will play a critical role in strengthening the organization's security posture by leading vulnerability lifecycle management, automating remediation processes, and partnering across infrastructure, cloud, platform engineering, and application teams.What You'll DoManage the end-to-end vulnerability management lifecycle, including identification, assessment, prioritization, remediation validation, and reporting.Perform vulnerability assessments across operating systems, applications, cloud platforms, containers, and network environments.Operate and optimize vulnerability scanning tools and security assessment frameworks.Drive automation initiatives using Python and PowerShell to improve remediation workflows and reporting.Analyze threat intelligence, exploit data, CVSS scores, and emerging vulnerabilities to support risk-based prioritization.Collaborate with Infrastructure, Cloud, Platform Engineering, DevSecOps, SOC, and Application teams to ensure remediation SLAs are achieved.Support security incidents by evaluating vulnerability impact, exploitability, and contributing to root cause analysis.Manage vulnerability exceptions, false-positive handling, and risk acceptance processes.Create executive-level reports and dashboards highlighting exposure trends and remediation progress.Required Skills & ExperienceTechnical SkillsQualys VMDRMicrosoft Defender Vulnerability ManagementNessusRapid7Linux AdministrationWindows AdministrationPython ScriptingPowerShell ScriptingVulnerability Assessment & ManagementSecurity AutomationCybersecurity ExpertiseCloud SecurityApplication SecurityNetwork & Endpoint SecuritySecurity OperationsThreat Detection & Incident ResponseIdentity & Access Management (IAM)Data Protection & EncryptionVulnerability Remediation ProgramsRisk-Based Vulnerability PrioritizationPreferred CertificationsCertified Ethical Hacker (CEH)Additional cybersecurity certifications such as Security+, CISSP, GIAC, or cloud security certifications are a plus.QualificationsBachelor's degree in Computer Science, Information Technology, Engineering, Telecommunications, or a related technical field.6-8 years of overall IT/Security experience.Minimum 5+ years of hands-on experience in Vulnerability Management and Security Operations.Strong understanding of enterprise infrastructure, cloud security, DevSecOps, and remediation practices.What Makes You SuccessfulStrong analytical and problem-solving skills.Excellent collaboration and communication abilities.Ownership mindset with strong attention to detail.Ability to work cross-functionally with technical and business stakeholders.Passion for cybersecurity, automation, and continuous improvement.Why Join OnX?Work with modern infrastructure and cloud technologies.Collaborate with experienced technology professionals across Canada.Gain exposure to enterprise-scale environments and strategic initiatives.Competitive compensation and benefits package.Professional development and certification support.Flexible work options depending on role requirements.CAD $72,000 – $96,000 base salary (not including bonus or commission)“The compensation range in this posting reflects the Company’s good‑faith estimate at the time of publication. The applicable base pay range for any individual will be determined based on the candidate’s designated primary work location as well as factors including role scope and responsibilities, required qualifications, and the individual’s experience, education, skills, knowledge, and performance. Certain positions may also be eligible for additional compensation such as discretionary merit increases, bonuses, or sales‑based variable compensation in accordance with applicable plans and role requirements.Diversity & InclusionOnX is an equal opportunity employer committed to creating an inclusive environment for all employees. We celebrate diversity and are dedicated to fostering a workplace where everyone can thrive regardless of race, religion, gender, age, disability, sexual orientation, or any other protected characteristic.