Senior Red Team Engineer

Stelfox Limited; Waterford; Hybrid; EUR 70,000 - 95,000; Full time

Job summary

Stelfox Limited in Waterford is seeking a Senior Red Team Operator to lead offensive security assessments and emulate adversaries across networks, apps and cloud environments.

You will develop custom tools, perform simulations, and contribute to Purple Team activities while researching emerging threats and techniques. Ideal candidates have 5+ years in offensive security and strong reporting skills.

Qualifications

• 5+ years in offensive security or penetration testing.
• Strong technical expertise across networks, applications and cloud environments.
• Experience with Red Team tooling, Active Directory exploitation and security research.
• Excellent communication and reporting skills.

Responsibilities

• Lead Red Team assessments and adversary simulations.
• Conduct network, web, mobile, and social engineering testing.
• Develop custom tools, scripts, and automation solutions.
• Support Purple Team exercises and detection validation.
• Research emerging threats and offensive security techniques.

Skills

Offensive security

Penetration testing

Network security

Cloud security

Red Team tooling

Active Directory

Security research

Communication

Reporting

Certifications

Job description

Stelfox is supporting one of our enterprise clients who are looking to add a Cyber security professional to their Red Team for offensive security initiatives.

Are you an experienced offensive security professional looking to take on advanced Red Team operations and adversary emulation exercises? We're looking for a Senior Red Team Operator to help strengthen our cyber resilience by identifying vulnerabilities, testing security controls, and simulating real-world attacks.

Key responsibilities

• Lead Red Team assessments and adversary simulations
• Conduct network, web, mobile, and social engineering testing
• Develop custom tools, scripts, and automation solutions
• Support Purple Team exercises and detection validation
• Research emerging threats and offensive security techniques

What we're looking for

• 5+ years in offensive security or penetration testing
• Strong technical expertise across networks, applications, and cloud environments
• Experience with Red Team tooling, Active Directory exploitation, and security research
• Excellent communication and reporting skills
• OSCP, SANS, CEH, CISSP, CPTS, or similar certifications are a plus

If you're passionate about offensive security and want to work on complex, high-impact engagements, I'd love to hear from you.

This role requires 2 days onsite in the office in Waterford with 3 days WFH.

Please note, candidates will need the required work authorisation visas/permits for the Republic of Ireland, to be considered for this opportunity.

Please note: Stelfox is fully compliant with GDPR regulations and you can read more in our privacy policy here: https://www.stelfox.com/privacy-policy-gdpr/. Your shared data will not be disclosed or transferred to a third party data controller or data processor located outside the EEA unless we have obtained your express consent. We look forward to working with you.