Senior Offensive Security Engineer - Red Team

Stelfox IT Recruitment; Waterford; Hybrid; EUR 90,000 - 125,000; Full time

Job summary

Stelfox IT Recruitment is seeking a Senior Red Team Operator to advance advanced Red Team operations and adversary emulation. You will lead assessments, simulate attacks, and develop tools to test security controls, with hybrid onsite/remote work in Waterford.

The role requires 5+ years in offensive security, strong networking, app and cloud skills, and experience with AD exploitation. Excellent reporting and communication are essential for success.

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

Red Team

Penetration Testing

Adversary Emulation

Network Security

Cloud Security

AD Exploitation

Threat Research

Tooling & Automation

Tools

Red Team tooling

Active Directory

Automation Scripting

Job description

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

This roles 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.