senior security specialist - penetration testing.
- thunder bay, ontario
- posted 3 march 2026
- closes 1 june 2026
job details
summary
- thunder bay, ontario
- contract
- job categoryinformation technology
job details
We are seeking a Senior Security Specialist with over a decade of hands-on experience in offensive security to safeguard large-scale infrastructure and information resources. This role is focused on identifying and mitigating complex security gaps through rigorous penetration testing, red team exercises, and source code reviews. You will act as a critical advisor on security architecture and safeguards, ensuring that highly sensitive systems are deployed securely and remain resilient against emerging threats.
...
Pay Rate: $609.2- $643.85/Diem
Advantages
- Influence the security posture of critical infrastructure supporting a massive, wide-reaching user base.
- Work at the forefront of security technology, protecting systems where data protection is a primary mission.
- Utilize and evaluate enterprise-grade security technologies, including forensic investigation tools and malicious software mitigation suites.
- Provide subject matter expertise on emerging IT trends, compliance, and disaster recovery planning for business-critical operations.
Responsibilities
- Conduct end-to-end penetration tests, network vulnerability assessments, and threat hunting across diverse environments.
- Identify, analyze, and exploit common web application vulnerabilities using a combination of manual techniques and enterprise-grade automated tools.
- Perform deep-dive Source Code Reviews using SAST (Static Application Security Testing) and DAST (Dynamic Application Security Testing) to discover inherent logic flaws or security bugs.
- Execute red team exercises to simulate real-world cyberattacks, testing the effectiveness of organizational defenses and incident response protocols.
- Translate complex technical findings into authoritative reports for a diverse audience, providing actionable recommendations to both executive leadership and technical teams.
- Define and assess security requirements for IT projects, ensuring the incorporation of encryption, access controls, and authentication measures in distributed systems.
- Ensure all security measures align with relevant legislation and corporate directives regarding information confidentiality and personal privacy.
Qualifications
- Extensive experience conducting high-level penetration tests in complex, enterprise-wide environments.
- Proven track record in reviewing source code for .NET, Java, and other languages to identify vulnerabilities at the logic level.
- Exceptional ability to document risks and provide strategic recommendations to executive and non-technical management.
- Proficient with Windows and Linux operating systems, common network protocols, and infrastructure monitoring tools.
- Strong understanding of PKI, digital signatures, encryption standards, and secure design principles.
- Experience implementing security within high-sensitivity, complex distributed systems where confidentiality and integrity are paramount.
Summary
If you are a Senior Security Professional who excels at thinking like an adversary to protect mission-critical systems and possesses the communication skills to drive organizational change, we encourage you to apply today!
Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada's workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.
Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to accessibility@randstad.ca to ensure their ability to fully participate in the interview process.
This posting is for existing and upcoming vacancies.
We are seeking a Senior Security Specialist with over a decade of hands-on experience in offensive security to safeguard large-scale infrastructure and information resources. This role is focused on identifying and mitigating complex security gaps through rigorous penetration testing, red team exercises, and source code reviews. You will act as a critical advisor on security architecture and safeguards, ensuring that highly sensitive systems are deployed securely and remain resilient against emerging threats.
Pay Rate: $609.2- $643.85/Diem
Advantages
- Influence the security posture of critical infrastructure supporting a massive, wide-reaching user base.
- Work at the forefront of security technology, protecting systems where data protection is a primary mission.
- Utilize and evaluate enterprise-grade security technologies, including forensic investigation tools and malicious software mitigation suites.
- Provide subject matter expertise on emerging IT trends, compliance, and disaster recovery planning for business-critical operations.
Responsibilities
- Conduct end-to-end penetration tests, network vulnerability assessments, and threat hunting across diverse environments. ...
Pay Rate: $609.2- $643.85/Diem
Advantages
- Influence the security posture of critical infrastructure supporting a massive, wide-reaching user base.
- Work at the forefront of security technology, protecting systems where data protection is a primary mission.
- Utilize and evaluate enterprise-grade security technologies, including forensic investigation tools and malicious software mitigation suites.
- Provide subject matter expertise on emerging IT trends, compliance, and disaster recovery planning for business-critical operations.
Responsibilities
- Conduct end-to-end penetration tests, network vulnerability assessments, and threat hunting across diverse environments. ...
- Identify, analyze, and exploit common web application vulnerabilities using a combination of manual techniques and enterprise-grade automated tools.
- Perform deep-dive Source Code Reviews using SAST (Static Application Security Testing) and DAST (Dynamic Application Security Testing) to discover inherent logic flaws or security bugs.
- Execute red team exercises to simulate real-world cyberattacks, testing the effectiveness of organizational defenses and incident response protocols.
- Translate complex technical findings into authoritative reports for a diverse audience, providing actionable recommendations to both executive leadership and technical teams.
- Define and assess security requirements for IT projects, ensuring the incorporation of encryption, access controls, and authentication measures in distributed systems.
- Ensure all security measures align with relevant legislation and corporate directives regarding information confidentiality and personal privacy.
Qualifications
- Extensive experience conducting high-level penetration tests in complex, enterprise-wide environments.
- Proven track record in reviewing source code for .NET, Java, and other languages to identify vulnerabilities at the logic level.
- Exceptional ability to document risks and provide strategic recommendations to executive and non-technical management.
- Proficient with Windows and Linux operating systems, common network protocols, and infrastructure monitoring tools.
- Strong understanding of PKI, digital signatures, encryption standards, and secure design principles.
- Experience implementing security within high-sensitivity, complex distributed systems where confidentiality and integrity are paramount.
Summary
If you are a Senior Security Professional who excels at thinking like an adversary to protect mission-critical systems and possesses the communication skills to drive organizational change, we encourage you to apply today!
Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada's workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.
Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to accessibility@randstad.ca to ensure their ability to fully participate in the interview process.
This posting is for existing and upcoming vacancies.
share this job.
the application process.
See what comes ahead in the application process. Find out how we help you land that job.
1 of 8apply with randstad.
Applying with us is easy. We will review your application and see if you are a good fit for the job and the company.
2 of 8we'll give you a call.
Our consultant will call you at a suitable time to discuss your application and further career aspirations.
3 of 8getting you registered.
If you’ve never worked with us before, we’ll need some basic additional pieces of information to confirm your eligibility for work.
4 of 8compliance check.
Next, we just need to verify a few things - we’ll make the relevant compliance checks and keep you posted.
5 of 8reference and background check.
As part of the process in ensuring you’re perfect for the role, we’ll make contact with any relevant references you’ve provided.
6 of 8the perfect job for you.
Our expert team will either arrange an interview for the role you’ve applied for, or if they believe there’s a better opportunity, they’ll suggest alternative options too.
7 of 8the interview.
We’ll ensure that you’re fully prepared ahead of your interview and know exactly what to expect - good luck!
8 of 8start your new job.
Congratulations, you’re ready to begin your new job. The team will ensure that you’re fully prepared for your first day.
let similar jobs come to you
We will keep you updated when we have similar job postings.
Thank you for subscribing to your personalised job alerts.