Security Engineer (Product Security & Business Enablement)

About the Opportunity

Mariner is seeking a senior Security Engineer to join our dynamic Security Engineering & Architecture team. Reporting to the VP, Security Engineering & Architecture, you will serve as an embedded security partner to business, product, data, and technology teams. Your mission: empower innovation by translating business goals into practical, scalable security architecture and reusable design patterns that enable new capabilities—safely and efficiently.

This role is highly collaborative and focused on breadth. You’ll engage with cross-functional teams while solutions are still evolving, embedding security from the start. You’ll secure Mariner’s modern business platforms—including SaaS services, custom applications, APIs, data flows, and AI capabilities—by providing clear guidance, designing pragmatic controls, and accelerating business outcomes without slowing down delivery.

Key Responsibilities

• Assess end-to-end architectures spanning SaaS platforms, internally developed applications, APIs, integrations, data services, and AI; identify trust boundaries, sensitive data flows, and failure modes

• Facilitate architecture and threat reviews wit