Security Engineer (Product Security & Business Enablement)

Mariner is seeking a senior Security Engineer to join their dynamic Security Engineering & Architecture team. Reporting to the VP of Security Engineering & Architecture, this role involves serving as an embedded security partner to business, product, data, and technology teams. The mission is to empower innovation by translating business goals into practical, scalable security architecture and reusable design patterns that enable new capabilities—safely and efficiently.

The role is highly collaborative and focused on breadth, requiring engagement with cross-functional teams during the evolution of solutions. The Security Engineer will 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 with delivery teams; document decisions and residual risk.
• Own and maintain a library of secure-by-design patterns for SaaS adoption, APIs, integrations, data movement, secrets, credentials, authorization, and AI-enabled workflows.
• Translate security requirements into practical designs that enable business outcomes, reducing reliance on late-stage reviews.
• Serve as a primary security partner for product, enterprise architecture, data, and technology teams, engaging early in roadmaps and design.
• Provide security expertise in vendor evaluations and SaaS selection in partnership with procurement and enterprise architecture.
• Collaborate with Security Platform Engineering to convert security requirements and approved patterns into automated guardrails and self-service workflows.
• Partner with Identity & Access and Infrastructure teams on authentication, authorization, posture management, and observability.
• Provide technical security support for AI-enabled products and workflows, ensuring secure data boundaries and auditability.
• Support evolving enterprise data strategy, M&A activities, and technology onboarding with robust security architecture.
• Enable business and technology teams via regular office hours, training, and embedded engagement; build security fluency and support sound decision-making.

What You Bring:

Required:

• A Bachelor’s degree in Computer Science, Engineering, Information Security, or related field (or equivalent practical experience).
• 10+ years of experience in security architecture, cloud/SaaS security, solutions architecture, software engineering, or SRE/DevOps, with at least 5 years in a dedicated security role.
• A demonstrated track record securing distributed business systems with SaaS, APIs, integrations, identity, and third-party services.
• Ability to rapidly analyze unfamiliar architectures, identify material risks, and translate findings into actionable designs.
• Experience partnering with business, engineering, and product teams to shape secure solutions and make risk-aware decisions.
• Evidence of pragmatic, business-aware security thinking—able to revise requirements to match business context, with clear rationale and tradeoffs.

Preferred:

• Hands-on engineering or architecture background plus experience collaborating with business or product teams.
• Experience shifting the perception of security from a business obstacle to an enabler.
• Background in SaaS- and integration-rich environments with AI-enabled workflows.
• Familiarity with data security concepts (classification, DLP, encryption, data governance, etc.).
• Experience in financial services, wealth management, regulated industries, or M&A technology integrations.
• Security certifications (CISSP, CCSP, CSSLP, cloud security) are valued but not required; demonstrated impact matters most.

Core Skills:

• Strong systems-thinking and security-architecture abilities across SaaS, APIs, integrations, data, cloud, and AI.
• Ability to bridge business outcomes and technical controls—quickly and credibly.
• Exceptional communication and facilitation skills; able to influence and build trust across business and engineering stakeholders.
• Pragmatic approach to risk—focus on material threats and empowering the business.
• Technical credibility to challenge designs, review APIs, and reason authentically about authentication and authorization.
• Adaptability, curiosity, and comfort navigating rapidly evolving ecosystems.

Leadership & Growth:

This is a senior individual contributor role with broad technical influence and mentorship responsibilities. Future direct leadership opportunities may arise as Mariner grows.

Work Environment & Benefits:

• A professional, remote-first environment with limited travel (less than 10%).
• Inclusive culture where security is a business partner, not a gatekeeper.
• Access to industry-leading technology platforms and forward-thinking colleagues.