Director – Offensive Security & Assurance

Function: Proactive Threat Operations, Cybersecurity

The Director, Offensive Security & Assurance will lead Aon’s global offensive security and security assurance capabilities within Proactive Threat Operations (PTO). This role is responsible for proactively identifying exploitable security weaknesses, validating defensive controls against real-world adversary techniques, and driving findings through to measurable improvements in Aon’s security posture.

This leader will evolve traditional penetration testing and point‑in‑time assessments toward a more continuous, threat‑informed model incorporating adversary emulation, purple teaming, attack‑path analysis, control validation, and targeted security assurance. A core objective of the role is to answer, on an ongoing basis: Can an attacker successfully exploit this path today, and if so, what are we doing to eliminate it?

The Director will partner closely with Threat Intelligence, Threat Hunting, Vulnerability & Exposure Management, Applied Security Research, AC3/SOC, Security Engineering, Identity & Access Management, Cloud, application security, and broader technology teams. Success will be measured by validated risks identified, attack paths eliminated, controls improved, detections strengthened, and remediation verified — not simply the number of assessments completed or findings produced.

At Aon, we shape decisions for the better to protect and enrich the lives of people around the world.

As an organization, we are united through trust as one inclusive team and we are passionate about helping our colleagues and clients succeed.

Lead the global Offensive Security & Assurance capability within Proactive Threat Operations.

Define the offensive security strategy, operating model, priorities, standards, and technical roadmap.

Evolve traditional penetration testing toward continuous adversary validation and recurring purple‑team operations.

Develop and maintain threat‑informed adversary emulation scenarios based on relevant threat intelligence, incidents, emerging techniques, and Aon‑specific exposures.

Plan, conduct, and oversee testing across endpoint, identity, Active Directory, Entra ID, cloud, SaaS, network, applications, APIs, browser, and broader enterprise attack paths.

Build and mature a purple‑team capability that connects offensive testing directly with AC3/SOC detection and response.

Partner with Threat Intelligence to translate adversary activity into realistic offensive testing scenarios.

Partner with Threat Hunting to identify hypotheses and attack paths that warrant proactive validation.

Partner with Vulnerability & Exposure Management to determine whether vulnerabilities and exposures are actually exploitable in Aon’s environment.

Validate whether remediation actions and compensating controls meaningfully eliminate identified attack paths.

Require retesting and technical evidence before material offensive‑security findings are considered closed.

Identify opportunities to eliminate attack paths through architecture, configuration, identity, endpoint, cloud, network, or application control changes.

Establish continuous control‑validation exercises around Aon’s highest‑risk attack scenarios.

Develop repeatable adversary‑emulation playbooks mapped to MITRE ATT&CK and observed threat behavior.

Improve detection engineering by providing AC3/SOC with telemetry, behaviors, techniques, and test evidence derived from offensive exercises.

Collaborate with Applied Security Research to develop offensive tooling, automation, testing frameworks, and novel security‑assessment techniques.

Maintain appropriate testing governance, authorization processes, safety controls, and rules of engagement for offensive activity.

Manage internal testing capabilities and external penetration‑testing/red‑team partners where required, ensuring third‑party assessments supplement internal capabilities rather than serving as the primary operating model.

Provide senior leadership with clear, concise reporting on exploitable risk, defensive effectiveness, remediation progress, and systemic control weaknesses.

Recruit, develop, and mentor offensive security practitioners and build deep technical capability within the team.

This is more than a traditional offensive security leadership role. You'll lead the evolution of Aon's global offensive security program, moving beyond point-in-time assessments to continuous adversary validation, purple teaming, and attack-path elimination. Working alongside leaders across Threat Intelligence, SOC, Security Engineering, Cloud, Identity, and Application Security, you'll directly influence how Aon identifies, validates, and reduces cyber risk at scale while building a world-class team and capability.