Senior Offensive Security Specialist

At Uni Systems, we are working towards turning digital visions into reality. We are continuously growing and we are looking for a Senior Offensive Security Specialist to join our UniQue team.

What will you be doing in this role?

• Conduct comprehensive penetration tests on on-premise and cloud-based Windows/Linux systems, web applications, APIs, and networks.
• Identify, exploit, and document vulnerabilities, providing clear mitigation recommendations.
• Collaborate with the SOC team to refine and test cybersecurity use cases and develop threat hunting strategies.
• Support incident response activities with offensive expertise to help contain and mitigate security incidents.
• Execute red team and adversary emulation exercises using tools such as Atomic Red Team, MITRE Caldera, Metasploit, and Burp Suite.
• Design and perform tactical simulations to assess and improve defensive capabilities.
• Perform cloud penetration testing on AWS, Azure, and Google Cloud environments, identifying vulnerabilities across infrastructure, applications, and services.
• Prepare detailed technical reports and executive summaries of findings and recommendations.
• Maintain documentation of methodologies, tools, and results to ensure consistent testing practices.
• Stay up to date with emerging threats, attack techniques, and security tools.
• Research, evaluate, and integrate new tools or methods to enhance offensive security capabilities.
• Identify and prioritize vulnerabilities for remediation based on risk and potential impact.
• Provide training, mentorship, and workshops to IT security colleagues on offensive techniques and cybersecurity best practices.

What do you need to succeed in this position?

• Bachelor’s degree in IT or a related field and minimum 12 years of relevant experience.
• At least 6 years of experience in testing and cybersecurity.
• Minimum of 2 certifications, one in offensive security (e.g., OSCP, CRTO, GPEN, GXPN, CCSP) and one in cybersecurity, IT, computer science, governance, etc.
• Proven experience in penetration testing across on-premise, web, and cloud environments.
• Strong knowledge of network protocols, encryption, and common attack techniques.
• Hands-on experience with penetration testing and red team tools, including: Active Directory & Enterprise Attacks, Command & Control (C2) Frameworks, Payload Generation & Shellcode Development, Binary Exploitation & Vulnerability Research, Reverse Engineering & Debugging, Fuzzing & Automated Vulnerability Discovery, Network Reconnaissance & Attacks, Tactical Simulation & Adversary Emulation.
• Solid experience with Windows, Linux, and cloud platforms (AWS, Azure, GCP).
• Scripting or programming skills in PowerShell, Python, Bash, or similar.
• Experience collaborating with SOC teams and supporting incident response.
• Advanced English (C1) communication skills (written and spoken).

At Uni Systems, we are providing equal employment opportunities and banning any form of discrimination on grounds of gender, religion, race, color, nationality, disability, social class, political beliefs, age, marital status, sexual orientation or any other characteristics. Take a look at our Diversity, Equality & Inclusion Policy for more information.