FIRMUS logo

Senior Penetration Tester

FIRMUS Kuala Lumpur, Kuala Lumpur, Malaysia

onsitefull-time
Posted Sep 18, 2026Apply by Oct 18, 2026
  • Role & seniority

    • Penetration Testing Lead (technical leadership; senior, ~5+ years experience)
  • Stack/tools

    • Offensive/security tooling for exploitation & vuln analysis

    • MITRE ATT&CK mapping

    • Web, mobile, cloud, and network testing tooling (not explicitly listed)

    • Certifications such as OSCP, CREST CRT (or equivalent)

  • Top 3 responsibilities

    • Lead and design scoped advanced engagements (penetration testing and security assessments across network, web apps, mobile, and cloud)

    • Execute advanced offensive testing, including red team exercises, to simulate real-world threats

    • Oversee deliverables: document findings with prioritized, actionable recommendations; provide technical QA for junior consultant reports

  • Must-have skills

    • Hands-on penetration testing expertise (web/mobile) and ability to manage/lead Red Team activities

    • Expert knowledge of exploitation techniques, attack methodologies, and vulnerability analysis

    • Strong analytical skills and high attention to detail for complex research and reporting

    • Clear client communication; can explain findings to both technical and executive audiences

    • Mentorship/technical leadership for junior consultants

  • Nice-to-haves

    • OSCP / CREST CRT (or equivalent) certifications
  • Location & work type

    • WP. Kuala Lumpur

    • Full-time, on-site

Full Description

The Penetration Tester will be serving as the Penetration Testing Lead, is a technical leadership role responsible for steering and executing advanced offensive security engagements. This role requires a security practitioner capable of designing, managing, and delivering comprehensive security assessments including penetration testing, red teaming, and application security reviews to identify critical vulnerabilities and assess organizational risk across diverse client environments.

Key Responsibilities

Technical Leadership & Execution

Design and Scope Engagements: Plan, scope, and lead security assessment activities targeting network infrastructure, web applications, mobile platforms, and cloud environments.

Advanced Testing: Conduct offensive security exercises, including Red Team exercises, to simulate real-world threats and test defensive capabilities.

Post-Engagement Analysis: Oversee the thorough documentation of findings, providing clear, actionable, and prioritized recommendations to mitigate identified risks.

Consulting & Reporting

Client Collaboration: Work directly with clients to understand their security objectives, define testing parameters, and clearly communicate the technical findings and associated business risk.

Quality Assurance (QA): Serve as a technical QA reviewer for reports and deliverables produced by junior consultants, ensuring accuracy, clarity, and adherence to industry best practices.

Strategic Advisement: Provide strategic counsel to clients on enhancing their overall security posture, incident response capabilities, and adherence to relevant compliance standards.

Team Mentorship & Growth

Mentorship: Mentor and train junior consultants, fostering the development of technical skills in penetration testing methodologies, application security, and report writing.

Qualifications & Experience

Essential Technical Expertise

Proven Expertise: 5+ years of demonstrable experience in hands-on penetration testing, web and mobile application security, and managing Red Team exercise.

Offensive Security Skills: Expert knowledge of common exploitation techniques, attack methodologies (e.g., MITRE ATT&CK), and vulnerability analysis tools.

Foundational Knowledge: Broad and deep understanding of core Cybersecurity principles, defensive architectures, and regulatory frameworks.

Educational & Professional Requirements

Certifications: Possession of industry-leading certifications such as OSCP, CREST CRT or equivalent is highly advantageous.

Analytical Skills: Exceptional analytical ability and meticulous attention to detail required for complex vulnerability research and reporting.

Soft Skills & Work Environment

Communication: Excellent verbal and written communication skills, with the ability to articulate complex technical concepts to both technical and executive audiences.

Team Collaboration: Demonstrated ability to lead projects, work effectively on-site, and collaborate seamlessly with cross-functional internal and client teams.

Location: Commitment to working full-time on-site in WP. Kuala Lumpur.

Penetration testingRed teamingApplication securityNetwork infrastructure securityCloud securityVulnerability analysisMITRE ATT&CKTechnical leadershipMentorshipReport writingRisk assessmentIncident responseCompliance standardsQA reviewmulti-location

Cookies & analytics consent

We serve candidates globally, so we only activate Google Tag Manager and other analytics after you opt in. This keeps us aligned with GDPR/UK DPA, ePrivacy, LGPD, and similar rules. Essential features still run without analytics cookies.

Read how we use data in our Privacy Policy and Terms of Service.