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Castillians

Senior Penetration Tester

Castillians

Conducting penetration tests across diverse platforms for consulting firm. Leading engagements with financial institutions and providing risk-based remediation recommendations.

Posted 6/27/2026full-timeRemote • 🇮🇪 IrelandSeniorWebsite

Tech Stack

Tools & technologies
Cloud

About the role

Key responsibilities & impact
  • Conducting extensive penetration tests across networks, applications, cloud environments, and infrastructure
  • Scanning the client's external exposure websites and domains to identify security vulnerabilities and performing vulnerability assessments, and providing risk-based remediation recommendations
  • Lead Threat-Led Penetration Testing (TLPT) / TIBER engagements
  • Utilizing Threat Intelligence methodologies to simulate realistic attack scenarios
  • Producing detailed technical reports outlining findings, risk levels, and mitigation strategies
  • Collaborating with security teams, SOC analysts, and blue teams to improve defensive strategies
  • Staying updated on the latest attack techniques, tools, and industry best practices
  • Developing and deploying custom tooling and malware for Red Team engagements
  • Guiding and mentoring junior team members

Requirements

What you’ll need
  • Conducting extensive penetration tests across networks, applications, cloud environments, and infrastructure
  • Scanning the client's external exposure websites and domains to identify security vulnerabilities and performing vulnerability assessments, and providing risk-based remediation recommendations
  • Lead Threat-Led Penetration Testing (TLPT) / TIBER engagements, working with financial institutions and regulatory bodies
  • Utilizing Threat Intelligence methodologies to simulate realistic attack scenarios
  • Producing detailed technical reports outlining findings, risk levels, and mitigation strategies
  • Collaborating with security teams, SOC analysts, and blue teams to improve defensive strategies
  • Staying updated on the latest attack techniques, tools, and industry best practices
  • Developing and deploying custom tooling and malware for Red Team engagements to improve the client's security posture
  • Guiding and mentoring junior team members on documentation, processes, and addressing technical queries

Benefits

Comp & perks
  • Remote work options

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
penetration testingvulnerability assessmentsThreat-Led Penetration Testing (TLPT)TIBER engagementsThreat Intelligence methodologiestechnical reportingcustom tooling developmentmalware developmentrisk-based remediationattack simulation
Soft Skills
collaborationmentoringguidancecommunicationleadership