Senior Engineer

Job Description
Building trusted markets —powered by our people.
At Cboe, we inspire our people to solve complex challenges together because what we do matters. We provide the financial infrastructure that powers the global economy. As a leading provider of market infrastructure and tradable products, Cboe delivers cutting-edge trading, clearing and investment solutions to market participants around the world.
We’re building inclusive ways to support professional and personal development while strengthening the trust we’ve earned as a global market leader. Our teams are empowered to share ideas, actively pursue them and bring on a challenge. As champions of internal mobility and access to opportunity, we encourage our people to “go for it” and equip our managers with the training to coach their teams to the next level. Our Associate Resource Groups champion diversity, equity and inclusion, giving associates a safe space to network, share ideas and create opportunities.
PLEASE NOTE: To support strong partnership and team connection, this role follows a four day in office work model.
Location OverviewCboe HQislocated inthe historic Old Post Officedistrict,it’s a landmark that blends classic architecture with modern amenities. The building features expansive spaces withhigh ceilingsand large windows, offering an abundance of natural light and panoramic views of thecityskyline and the Chicago River.
With its prime location in the heart of downtown, the OPO Building provides easy access to major transportation hubs, including Union Station and multiple CTA lines, making it convenient for commuters. The building is home to a variety of amenities, including restaurants,afitness center, and collaborative workspaces, creating a vibrant and dynamic work environment in one of Chicago's most iconic areas.
Role OverviewThe Senior Engineer Threat Hunting will be a senior individual contributor within Cboe’s Security Operations organization, responsible for defining, advancing, and executing the enterprise approach to detection engineering, threat hunting, and adversary emulation. This role focuses on building and maturing detection capabilities across platforms such as SIEM, EDR, identity, cloud, and SaaS environments, ensuring detections are resilient, scalable, and aligned to real‑world adversary behavior. The Senior Engineer Threat Hunting will lead complex, hypothesis‑driven threat hunts, partner closely with stakeholders to design and execute adversary emulation scenarios, and translate findings into durable detections, improved telemetry, and architectural enhancements. This individual will also serve as a technical lead during the most complex or high‑severity security incidents, shaping investigative approach and long‑term defensive improvements.
In this role you’ll be responsible for:Owning the enterprise detection engineering capability end‑to‑end, including standards, patterns, quality bars, and long‑term technical directionDesigning, implementing, and reviewing high‑fidelity detections across endpoint, identity, cloud, network, and SaaS environmentsLeading complex, hypothesis‑driven threat hunts that address ambiguous, cross‑organizational risk and novel attacker behaviorTranslating threat hunting outcomes into robust detections, improved telemetry, or architectural changes rather than one‑off findingsPartnering with internal stakeholders to design and execute adversary emulation scenarios that validate real‑world detection and response effectivenessIdentifying systemic detection and response gaps and driving remediation across engineering, operations, and architecture teamsActing as the technical lead during highest‑severity incidents, guiding investigative approach and defensive improvementsInfluencing security strategy, roadmaps, and investment decisions by translating technical findings into business and risk contextProvide expert recommendations and best practices to security managers, technical managers, and stakeholders including legal and regulatory teams.
Mentoring senior engineers and analysts and setting the technical bar for excellence across detection, hunting, and adversary emulationStay current with industry trends, security standards, and best practices to ensure our systems remain secure against evolving threats.
The ideal candidate has:5-8+ years of experience in cybersecurity operations, detection engineering, threat hunting, or offensive securityDeep expertise in attacker tradecraft, adversary behaviors, and defensive detection techniques across multiple domainsStrong hands‑on experience with SIEM, EDR, cloud security platforms, and large‑scale log analytics (Google SecOps, Defender XDR, Crowdstrike)A proven ability to solve ambiguous, systemic, cross‑organizational security problems with minimal directionExperience balancing hands‑on execution with strategic influence, knowing when to build directly and when to enable othersThe ability to operate with near‑complete autonomy, setting technical d