This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Security Engineer, Threat Detection & Response based in United States. This is a senior-level security engineering role within a growing Threat Detection and Response function. You will operate on the front line of defense, investigating and responding to sophisticated internal and external threats. The role combines incident response, digital forensics, threat hunting, data analytics, detection engineering, and automation. You will help shape the strategy and capabilities used to detect, contain, and mitigate threats at scale. Your work will extend beyond individual incidents, with a strong focus on root-cause analysis and eliminating recurring security risks. You will collaborate with engineering, Legal, Privacy, and other teams in a complex and fast-moving environment. The position is ideal for a creative, self-directed security professional who can lead through influence under pressure.