Founding Security Researcher

Added 11/09/2026

We are seeking a Founding Security Researcher to establish and lead the security research function from the ground up. This is a highly influential role for an experienced security professional who enjoys investigating emerging threats, translating technical findings into practical defensive strategies, and shaping the direction of a growing security programme. You will work closely with engineering, product, infrastructure, and leadership teams to identify risks, strengthen security controls, and build a culture of security by design. Your responsibilities will include conducting in-depth research into vulnerabilities, attack techniques, malware, exploitation methods, and relevant developments across the threat landscape. You will design...

Founding AI Security Engineer / Researcher at Refractal

Added 01/09/2026

We are seeking a Founding AI Security Engineer / Researcher to define and build the security foundations for advanced artificial intelligence systems. This is an early, high-impact role for someone who is comfortable working across research, engineering, and product development. You will investigate emerging threats affecting machine learning models, AI agents, data pipelines, and deployment infrastructure, translating your findings into practical safeguards and scalable security capabilities. Your responsibilities will include designing threat models for AI systems; identifying vulnerabilities such as prompt injection, data poisoning, model extraction, insecure tool use, and adversarial manipulation; and developing methods to evaluate model and application...

Founding CTO (+ Equity) at VC-backed AI security startup

Added 24/08/2026

An innovative, VC-backed startup at the forefront of AI security is seeking a visionary Founding CTO to join as a core member of the leadership team. This is a unique opportunity to take charge of the technology strategy and execution within a fast-paced, high-growth environment. As the Founding CTO, you will work closely with the founding team to define the technical roadmap, architect scalable solutions, and build a world-class engineering team. You will have significant influence over product direction and play a pivotal role in shaping the company’s culture and long-term success. Key responsibilities include designing and implementing secure, scalable...

Senior Consultant – Offensive Cyber Security

Added 11/09/2026

We are seeking a Senior Consultant – Offensive Cyber Security to lead and deliver sophisticated security assessments for a diverse range of clients and technology environments. You will plan and execute penetration tests, red team engagements, adversary simulations, vulnerability assessments and security reviews across applications, networks, cloud platforms, APIs, mobile technologies and infrastructure. You will be responsible for defining testing objectives, identifying realistic attack paths, safely exploiting vulnerabilities where appropriate, and assessing the potential business impact of your findings. The role includes managing engagements from scoping and rules of engagement through to technical delivery, quality assurance and client reporting. You...

Senior Consultant – Offensive Cyber Security

Added 11/09/2026

We are seeking a Senior Consultant – Offensive Cyber Security to lead and deliver high-quality penetration testing and red team engagements across a range of technical environments. You will work with clients to assess their security posture, identify exploitable weaknesses and provide practical recommendations that strengthen resilience against real-world threats. The role will involve planning and scoping engagements, defining testing methodologies, managing timelines and maintaining clear communication with technical and non-technical stakeholders. You will conduct advanced assessments across applications, APIs, networks, cloud environments, wireless infrastructure, Active Directory and physical security, using both established and creative techniques. Responsibilities will include vulnerability...

BDO Digital Offensive Senior Security Analyst

Added 01/09/2026

We are seeking a Digital Offensive Senior Security Analyst to join a highly skilled cybersecurity team focused on identifying, assessing, and reducing technology risk. In this role, you will lead sophisticated offensive security engagements across applications, infrastructure, cloud environments, networks, and emerging technologies. You will work closely with technical teams and business stakeholders to understand the threat landscape, simulate realistic attack scenarios, and provide clear, practical recommendations that strengthen security controls and resilience. Your responsibilities will include planning and delivering penetration tests, red team exercises, vulnerability assessments, and security reviews from scoping through to final reporting. You will research new...

Senior Consultant – Offensive Cyber Security

Added 25/08/2026

We are seeking a Senior Consultant – Offensive Cyber Security to lead and deliver high-quality penetration testing and offensive security engagements across a range of client environments. You will assess the resilience of applications, infrastructure, networks, cloud platforms and emerging technologies, identifying vulnerabilities and demonstrating realistic attack paths. The role will involve scoping and planning engagements, managing delivery, maintaining clear communication with stakeholders, and producing accurate, commercially focused reports that provide practical remediation advice. You will be expected to contribute to the development of testing methodologies, tools and internal capabilities, while supporting junior consultants through coaching, technical review and knowledge...

Senior Consultant – Offensive Cyber Security

Added 25/08/2026

We are seeking a Senior Consultant – Offensive Cyber Security to lead and deliver high-quality penetration testing, red teaming and adversary simulation engagements across diverse client environments. You will assess the security of applications, networks, infrastructure, cloud platforms and connected technologies, identifying vulnerabilities and demonstrating realistic attack paths while maintaining a strong focus on safety, ethics and business impact. The role involves planning and scoping engagements, developing testing methodologies, executing technical assessments, analysing findings and producing clear, evidence-based reports for both technical and executive audiences. You will work closely with clients and internal stakeholders to communicate risks, explain technical vulnerabilities...

Senior Consultant – Offensive Cyber Security

Added 28/07/2026

Are you passionate about offensive cyber security and eager to take on challenging projects that protect organizations from emerging threats? We are seeking a skilled Senior Consultant – Offensive Cyber Security to join our growing team. In this role, you will lead and execute advanced penetration tests, red teaming exercises, and simulated attacks across a variety of client environments. You will be responsible for identifying vulnerabilities, developing exploits, and providing actionable recommendations to improve security postures. Collaborating closely with clients, you will deliver comprehensive reports, present findings to both technical and non-technical stakeholders, and help drive remediation efforts. To be...

Senior Consultant – Offensive Cyber Security

Added 28/07/2026

We are seeking a highly skilled Senior Consultant – Offensive Cyber Security to join our dynamic team. In this role, you will be responsible for leading offensive security engagements, including penetration testing, red teaming, and vulnerability assessments for a diverse portfolio of clients. You will utilize your expertise in various attack vectors and methodologies to simulate real-world attacks, providing actionable insights to enhance our clients’ security posture. Your ability to clearly communicate findings and recommendations will be crucial, as you will prepare detailed reports and present to both technical and non-technical stakeholders. The ideal candidate will have a strong background...

Senior Offensive Security Consultant

Added 22/07/2026

As a Senior Offensive Security Consultant, you will play a pivotal role within a dynamic and fast-paced security consulting team. You will be responsible for conducting advanced penetration tests across a diverse range of environments, including web applications, networks, cloud infrastructure, and mobile platforms. You will leverage your deep technical expertise to identify, exploit, and document security vulnerabilities, providing clear, actionable recommendations to clients. Your role will also involve simulating sophisticated attack scenarios, red teaming engagements, and developing custom tools or scripts to support assessments. The ideal candidate possesses a solid background in offensive security, with hands-on experience in penetration...

OT Cybersecurity Engineer (Offensive Security / Security Assessments / Security Testing)

Added 28/07/2026

We are seeking a skilled OT Cybersecurity Engineer specializing in Offensive Security, Security Assessments, and Security Testing to join our dynamic team. In this role, you will be responsible for conducting thorough security assessments of operational technology (OT) environments, identifying vulnerabilities, and recommending appropriate mitigation strategies. You will work closely with cross-functional teams to ensure that security measures are effectively implemented and aligned with industry best practices. Your key responsibilities will include performing penetration testing and vulnerability assessments on OT systems, analyzing security controls and configurations, and developing detailed reports on findings with actionable recommendations. You will also participate in...

Head of Offensive AI Security & Technical Excellence

Added 15/09/2026

We are seeking a visionary Head of Offensive AI Security & Technical Excellence to lead the development of advanced security capabilities across artificial intelligence, machine learning, and emerging technologies. This senior role will define and execute an offensive security strategy focused on identifying, validating, and reducing risks in AI-enabled products, platforms, models, and supporting infrastructure. You will build and lead a high-performing team of security researchers, red teamers, penetration testers, and technical specialists, fostering a culture of curiosity, responsible challenge, and continuous improvement. Your responsibilities will include establishing programmes for AI red teaming, adversarial testing, threat modelling, vulnerability research, model...

Cyber Security Offensive Specialist

Added 04/09/2026

We are seeking a Cyber Security Offensive Specialist to strengthen an established security function and help identify, validate, and reduce cyber risk across applications, infrastructure, networks, cloud environments, and corporate systems. You will plan and conduct authorised penetration tests, vulnerability assessments, red team exercises, and adversary simulations, using a broad range of manual techniques and industry-standard tooling. Your work will help uncover weaknesses before they can be exploited and provide clear, practical recommendations for remediation. Key responsibilities include scoping and executing offensive security engagements, developing attack paths and test plans, analysing findings, and producing accurate technical and management-level reports. You...