Offensive Security Specialist

Vivid Resourcing; Brussel Hoofdstad; Sur place; EUR 65 000 - 90 000; Plein temps

Avantages offerts par ce poste

Group insurance

Health insurance

Résumé du poste

Vivid Resourcing is seeking an Offensive Security Specialist to join a security consultancy/enterprise security team serving clients across Belgium. You will lead proactive security assessments across web applications, networks, cloud environments, and AI/ML systems.

Responsibilities include planning and executing tests, reporting findings, mentoring juniors, and staying ahead of threats. OSCP is required; French or Dutch is a plus for local engagements.

Qualifications

• 3+ years in penetration testing, red teaming, or offensive security.
• OSCP required; OSCE, OSWE, OSEP, or CRTO a strong plus.
• Strong scripting/programming ability (Python, C, PowerShell, or similar).
• Deep knowledge of OWASP Top 10, Active Directory attack paths, and cloud security misconfigurations.
• Experience with common offensive tooling (Cobalt Strike, Burp Suite Pro, Metasploit).
• Fluent English; French or Dutch a strong advantage for local client work.
• Willingness to travel occasionally to client sites across Belgium.

Responsabilités

• Plan and execute penetration tests, vulnerability assessments, and red team engagements across web, mobile, network, and cloud (AWS/Azure) environments.
• Conduct social engineering and physical security testing where in scope.
• Identify, exploit, and clearly document vulnerabilities with actionable, risk-prioritized findings.
• Build and maintain custom tooling/scripts to support testing efficiency.
• Deliver technical and executive-level reports and present findings directly to client security teams.
• Stay ahead of emerging attack techniques, zero-days, and adversary tradecraft.
• Mentor junior testers and contribute to internal methodology development.

Connaissances

Penetration testing

Red teaming

Scripting (Python/PowerShell)

OWASP Top 10

Cloud security

Formation

OSCP certification

Outils

Cobalt Strike

Burp Suite Pro

Metasploit

Description du poste

We're hiring an Offensive Security Specialist to join a security consultancy/enterprise security team

serving clients across Belgium. You'll lead proactive security assessments — identifying weaknesses

before attackers do — across web applications, networks, cloud environments, and increasingly, AI/ML systems.

Key Responsibilities:

• Plan and execute penetration tests, vulnerability assessments, and red team engagements across web, mobile, network, and cloud (AWS/Azure) environments
• Conduct social engineering and physical security testing where in scope
• Identify, exploit, and clearly document vulnerabilities with actionable, risk-prioritized
• Build and maintain custom tooling/scripts to support testing efficiency
• Deliver technical and executive-level reports and present findings directly to client security teams
• Stay ahead of emerging attack techniques, zero-days, and adversary tradecraft
• Mentor junior testers and contribute to internal methodology development

Requirements:

• 3+ years in penetration testing, red teaming, or offensive security
• OSCP required; OSCE, OSWE, OSEP, or CRTO a strong plus
• Strong scripting/programming ability (Python, C, PowerShell, or similar)
• Deep knowledge of OWASP Top 10, Active Directory attack paths, and cloud security misconfigurations
• Experience with common offensive tooling (Cobalt Strike, Burp Suite Pro, Metasploit)
• Fluent English; French or Dutch a strong advantage for local client work
• Willingness to travel occasionally to client sites across Belgium

What's on Offer:

• Group and Health insurances.
• Clear progression path toward Incident Response or Threat Intelligence specialisms
• Exposure to EU institution and multinational client environments