Senior Offensive Security Consultant

ThreatScene Greece; United States; Remote; USD 120,000 - 180,000; Full time

Job summary

ThreatScene Greece seeks a Senior Offensive Security Consultant to join our Offensive Team (Unit 13). You will perform comprehensive penetration tests across web applications, APIs, cloud environments, and mobile platforms, and lead engagements with clients.

You will shape testing methodologies, mentor junior testers, and deliver detailed technical reports with remediation strategies. Occasional travel within Greece may be required as part of on-site engagements.

Qualifications

• Minimum 3+ years in penetration testing across web, API, cloud, and mobile.
• Experience leading teams or mentoring junior testers.
• Strong analytical and communication skills; able to present to technical and non-technical audiences.

Responsibilities

• Conduct comprehensive penetration tests and vulnerability assessments.
• Lead phishing simulations and red teaming engagements.
• Collaborate with testers to improve security posture for clients.
• Prepare detailed technical and executive reports with remediation guidance.
• Develop and refine offensive security methodologies and tools.
• Occasional on-site engagements with travel within Greece.

Skills

Penetration testing

Web app security

Cloud security

Team leadership

Communication

Programming (C, C++, Python, or Go)

Education

Bachelor's degree in Cybersecurity or related field

Tools

OSCP/OSCE/OSWE/CEP certifications

Job description

ThreatScene is redefining cybersecurity by delivering advanced solutions to safeguard public bodies, enterprises, the defence sector, maritime, and critical infrastructure. We empower organisations to navigate the cyber landscape confidently, ensuring resilience against evolving threats. At ThreatScene, we're building a secure, compliant, and resilient digital ecosystem.

We are looking for a Senior Offensive Security Consultant to join our growing Offensive Team (Unit 13) - In this role, you’ll conduct a wide range of offensive security assessments, collaborate closely with clients and internal teams, and help shape our penetration testing methodologies and capabilities.

Key Responsibilities

As a Senior Offensive Security Consultant, you will:

• Conduct comprehensive penetration tests and vulnerability assessments across web applications, APIs, microservices, mobile applications, cloud environments, IT/OT infrastructure, and Wi-Fi networks.
• Lead phishing simulations and red teaming engagements.
• Collaborate closely with other penetration testers to enhance clients' overall security posture.
• Prepare detailed technical reports and executive-level presentations, clearly communicating findings, associated risks, and recommended remediation strategies.
• Develop and refine internal testing methodologies and offensive security tools.
• Lead or support on-site client engagements (occasional short-term travel within Greece may be required).
• Contribute to research and development in offensive security techniques, tooling, and emerging threat landscapes.
• Stay informed of the latest vulnerabilities, exploits, and cybersecurity trends.

Requirements

• Bachelor's degree in Cybersecurity, Information Technology, or a related field.
• A minimum of 3+ years of professional experience in penetration testing, including areas such as web applications, APIs, cloud environments, infrastructure, and mobile platforms. Please note: this is not an entry-level position.
• Skilled in application-level security testing, including technical assessments, source code reviews, and thick client security testing.
• Proficiency in at least one programming language, such as C, C++, C#, Python, or Golang.
• One or more relevant certifications, such as OSCP, OSCE, OSWE, OSEP, GPEN, GWAPT, GXPN, CRTP, CRTE, or similar.
• Strong technical, analytical, and problem-solving abilities.
• Effective communication skills, with experience presenting findings to both technical and non-technical audiences.
• Demonstrated experience in leading penetration testing teams or mentoring junior team members.
• Ability to work independently and as part of a collaborative team.

Preferred

• Master's degree in Cybersecurity or a related field.
• Experience leading penetration testing teams or mentoring junior colleagues.
• Proven expertise in scoping and planning penetration testing engagements.
• Strong skills in application-level security testing, including technical assessments, source code reviews, and thick client testing.
• Experience conducting security configuration audits.

We're building the future of cyber - from compliance to resilience.