Red Team - Offensive Security Analyst - Manager

Technology has always been at the heart of what we do and deliver at EY. We need technology to keep an organization the size of ours working efficiently. We have 250,000 people in more than 140 countries, all of whom rely on secure technology to be able to do their job every single day.  Everything from the laptops we use, to the ability to work remotely on our mobile devices and connecting our people and our clients, to enabling hundreds of internal tools and external solutions delivered to our clients.  Technology solutions are integrated in the client services we deliver and is key to us being more innovative as an organization.

EY Technology supports our technology needs through three business units:

• Client Technology (CT) - focuses on developing new technology services for our clients. It enables EY to identify new technology-based opportunities faster, and pursue those opportunities more rapidly.
• Enterprise Workplace Technology (EWT) – EWT supports our Core Business Services functions and will deliver fit-for-purpose technology infrastructure at the cheapest possible cost for quality services. EWT will also support our internal technology needs by focusing on a better user experience.
• Information Security (Info Sec) - Info Sec prevents, detects, responds and mitigates cyber-risk, protecting EY and client data, and our information management systems.  

The opportunity

The Active Defense team is responsible for four core areas: Adversarial Testing (Purple Team), Proactive Threat Hunting, Anomaly Analysis, and Cyber Deception. This function plays a critical role in strengthening and maturing the firm’s enterprise security capabilities through threat-informed defense and continuous validation of security controls.

We are seeking an Active Defense Analyst with a strong information security background and a passion for using offensive security techniques to improve defensive outcomes. In its Purple Team capacity, the role will emulate adversary behaviors, validate security detections and defensive controls, and identify opportunities to enhance the effectiveness of security operations and incident response teams.

The successful candidate will communicate findings to both technical and non-technical audiences and collaborate across teams to identify, prioritize, and remediate security gaps. The position requires strong analytical and problem-solving skills, attention to detail, and the ability to work effectively both independently and as part of a team.

Skills and attributes for success

Essential Functions of the job:

• Conduct attack simulations against Windows or Linux Operating systems leveraging advanced cyber-attack vectors, exploitation methodologies, and intrusion set tactics, techniques, and procedures (TTPs).
• Research and identify patterns consistent with sophisticated attacker methodologies, and report on security concerns as they are escalated or identified.
• Experience with security concepts across on-premises, cloud, and hybrid enterprise environments.
• Evaluate, develop, and operationalize Artificial Intelligence (AI) capabilities to enhance adversary emulation, attack simulation, and security automation.
• Communicate with system owners, custodians, and IT stakeholders to facilitate security testing activities, including obtaining access to systems, digital artifact collection, and remediation activities.
• Develop and present technical findings, attack narratives, risk assessments, and remediation recommendations to both technical and non-technical stakeholders using written reports, presentations, and executive briefings.
• Maintain, manage, improve, and update security testing processes, procedures, and protocol documentation.
• Identify means to disrupt attacker actions, validate security detections and defensive controls, identify coverage gaps, and enhance defender response capabilities.

To qualify for the role, you must have:

• 6+ years of relevant experience in one or more of the following areas: Red Teaming, Purple Teaming, Offensive Security Operations, Exploit Development, Penetration Testing, Security Research, or similar roles.
• Proven hands-on experience with EDR evasion.
• Proficient with two or more programming languages such as C, C++, C# or Python.
• Experience with command-and-control channel frameworks, data obfuscation/encryption, and Active Directory exploitation.

Qualifications, Certifications and Education requirements:

• Bachelor’s or Master’s Degree in Computer Science, Information Systems, Engineering, a related field, or equivalent experience, and/or one or more of the following certifications: OSCP, OSEP, CRTO, GXPN, GPEN, GCIH, other relevant GIAC certs. 

Preferred:

• Extensive experience in applied enterprise hacking techniques (red/purple-teaming) across on-premises, cloud, and hybrid environments.
• Experience with adversary emulation frameworks, attack simulation platforms, and threat-informed defense methodologies.
• Background in DevSecOps, with the ability to rapidly build and deploy test scenarios to validate cyber threats and security concerns.

Supervising Responsibilities:

• The role requires mentoring, collaboration, and training of more junior associates.
• On rare occasions, may be required to work nights or weekends in support of incident response or penetration audits.