Senior Application Architect

The MTA is seeking a Senior Application Architect with deep expertise in AI agentic architecture, enterprise integration, and architecture standards. This hands-on role designs agent-based and AI-enabled solutions, defines integration patterns, publishes application architecture standards, and helps establish an Architecture Center of Excellence (COE). The architect will work in Azure, AWS, and hybrid environments.

1. AI Agentic Architecture * Design reference architectures for agentic AI: multi-agent orchestration, tool calling, RAG,

and human-in-the-loop controls.

• Define secure patterns for integrating agents with enterprise systems and APIs (e.g., MCP,

event-driven triggers).

• Establish guardrails for agent identity, access, auditability, observability, evaluation, and

cost.

1. Integration Architecture * Design and govern API-led, event-driven, and messaging integration patterns, including API

lifecycle and gateway strategy.

• Define integration patterns for legacy, SaaS, and cloud-native systems.

1. Standards & Architecture COE * Develop, publish, and maintain application, integration, API, and AI architecture standards

and reference architectures.

• Help establish and operate the COE: charter, governance forums, design reviews, training,

and playbooks.

• Define COE and standards-adoption metrics in coordination with AI IT adoption tracking.

1. Modernization, Security & Collaboration * Guide application modernization and cloud design on Azure, AWS, and hybrid environments. * Align designs with NIST (incl. AI RMF), CIS, ISO 27001, and MTA security requirements. * Partner with product, engineering, DevOps, and Cybersecurity teams; communicate clearly

to business and technical stakeholders.

Certification/Experience Preferred: Cloud certification and additional relevant certification, * 10+ years of application/enterprise architecture experience, including cloud-native design

on Azure and/or AWS.

• Experience delivering AI/LLM or agentic solutions in an enterprise.
• Experience authoring standards and operating an architecture COE or review board.
• Strong integration/API expertise and executive-level communication