Migration & Modernization
AWS for Mainframe Modernization : Your complete re:Invent 2025 guide
We’re just one month away from AWS re:Invent 2025, where builders, innovators, and transformation leaders from around the world will gather in Las Vegas to explore the future of cloud and AI. This year’s agenda features 15+ technical sessions and workshops on mainframe modernization, where you can learn from AWS experts, explore proven modernization strategies, and get hands-on experience with the latest AI innovations.
To help you maximize your week, we’ve curated a guide to the essential mainframe modernization sessions. From real-world customer stories to interactive workshops, these sessions provide an insider’s view of how organizations are leveraging AWS Transform to accelerate modernization and lay the foundation for business innovation and AI-readiness. Whether you’re looking to refactor legacy applications or completely reimagine your mainframe functions, you’ll return home with actionable insights and practical skills to drive modernization with confidence.
Breakout Sessions: Enterprise Modernization in Action
Our mainframe modernization experts and industry leaders from organizations such as BMW, ADP, and Western Union will share proven strategies and breakthroughs that are revolutionizing enterprise modernization.
Digital transformation excellence using agentic AI: From vision to victory (MAM204) | Level: 200
Type: Breakout session
Date: Tues, Dec 2 11:30 AM – 12:30 PM PST | Location: Wynn
Uncover strategies to achieve digital transformation at scale with the help of agentic AI. Hear how Danske Bank leveraged AWS Transform to reimagine a mainframe-based financial application containing over 140,000 lines of legacy code across 583 files, accelerating their modernization with precision, reliability, and compliance in a complex regulatory environment.
Derisk your mainframe exit with agentic AI-powered refactoring ft BMW & Fiserv (MAM205) | Level: 200
Type: Breakout session
Date: Wed, Dec 3 1:30 PM – 2:30 PM PST | Location: Caesars Forum
Learn how BMW and Fiserv modernized mission-critical mainframe applications with AWS Transform’s agentic AI, cutting project timelines, transforming millions of lines of legacy code, and improving code quality. You’ll leave this session with practical insights you can apply to your own large-scale modernization initiatives.
Reimagine mainframe workloads at speed with agentic AI – ft Itaú & ADP (MAM207) | Level: 200
Type: Breakout session
Date: Thur, Dec 4 3:30 PM – 4:30 PM PST | Location: MGM
Join leaders from ADP and Itaú as they share how they reimagined their mainframe-based systems with AWS Transform. Explore the architectural decisions and risk mitigation strategies that helped them accelerate development cycles, improve testing efficiency, and achieve faster time-to-cloud with the help of agentic AI.
Customize Your Mainframe Modernization with Composable agentic AI (MAM347) | Level: 300
Type: Breakout session
Date: Mon, Dec 1 3:00 – 4:00 PM PST | Location: Mandalay Bay
Discover how Western Union and Unum are customizing their mainframe modernization strategies through a composable architecture approach. Get an inside look at how they integrated specialized partner tools into AWS workflows to accelerate modernization timelines, reduce risk, and address unique challenges in complex mainframe environments.
Modernizing Global Payment Processing: Moving from Mainframe to AWS (SPS312) | Level: 300
Type: Breakout session
Date: Tues, Dec 2 1:00 PM – 2:00 PM PST| Location: Caesars Forum
Global Payments is transforming its 40-year-old mainframe system into a modern, cloud-native platform on AWS. Join this session to explore how enhanced observability and monitoring capabilities help power their secure, always-on payment processing for millions of global customers.
United Airlines GenAI powered Mainframe Emulator on AWS (sponsored by Deloitte) (AIM216-S) | Level: 200
Type: Breakout session
Date: Tues, Dec 2 11:30 AM – 12:30 PM PST | Location: Venetian
Discover how United Airlines is transforming a mission-critical mainframe application into a generative AI-powered interface built with Deloitte and AWS. Learn how they are leveraging the latest in agentic AI to simplify complex workflows, improve resilience, and empower frontline teams with intuitive, natural-language interfaces.
Modernizing Mercedes-Benz’s Global Ordering System with Gen AI (sponsored by Capgemini) (IND218-S) | Level: 200
Type: Breakout session
Date: Tues, Dec 2 4:30 PM – 5:30 PM PST| Location: Caesars Forum
Mercedez-Benz is redefining it mainframe-based global vehicle ordering system through generative AI-driven modernization with Capgemini and AWS. Discover how their approach—blending replatforming with agentic AI-powered code transformation—strengthens security, boosts agility, and creates a scalable, future-ready IT foundation.
Product Deep Dives and Hands-on Workshops
For those ready to roll up their sleeves, these sessions offer hands-on experience with the latest AI-powered modernization tools and frameworks. Put AWS Transform to work and see how agentic AI accelerates and derisks every stage of mainframe modernization.
Mainframe to cloud: Accelerated refactoring with AWS Transform agentic AI (MAM312) | Level:300
Type: Workshop
Date: Mon, Dec 1 8:00 AM – 10:00 AM PST | Location: Wynn
In this hands-on workshop, you’ll use AWS Transform for mainframe to analyze legacy COBOL codebases and refactor them into modern, cloud-ready Java. Through guided exercises, learn how agentic AI automates code analysis, documentation, and testing to reduce modernization timelines from years to months.
Mainframe to Microservices: Reimagine with AWS Transform & AI agents (MAM341) | Level:300
Type: Workshop
Date: Mon, Dec 1 12:00 PM – 2:00 PM PST | Location: Caesars Forum
Turn monolithic mainframe applications into scalable microservices with AWS Transform and Kiro, an AI-powered IDE assistant. This hands-on workshop demonstrates how AI agents extract business logic, generate microservices specifications, and deploy infrastructure as a code, all through natural language commands.
From VSAM to Amazon DynamoDB: Reimagining mainframe data with agentic AI (MAM322) | Level:300
Type: Builders’ session
Date: Wed, Dec 3 11:30 AM – 12:30 PM PST | Location: Caesars Forum
Explore how to transform VSAM data structures into cloud-native architectures using Amazon DynamoDB. In this builders’ session, learn to identify access patterns, optimize schema design, and overcome mainframe data format challenges to unlock elasticity, cost efficiency, and performance at scale.
Connect and Explore in the AWS Village
Step into the AWS Village to connect with experts, peers, and partners shaping the future of enterprise transformation. Discover networking lounges, interactive experiences, and live demos that bring innovation to life.
Mainframe modernization on display
Visit the mainframe modernization kiosk in the migration & modernization neighborhood to dive into product demos, speak with AWS experts, and discover how organizations like yours are accelerating their modernization journey with AWS Transform. Then, explore the Transformation Trail—a 5-minute gaming adventure with four interactive challenges. Each game reveals a secret digit; collect all four to unlock your prize!
Lightning Talks in the innovation theaters
While you’re visiting the AWS Village, tune in to one (or a few) of our many engaging lightning talks—a fast-paced showcase on how organization are modernizing at scale with AI-powered services. Don’t miss Enterprise-scale app modernization with Agentic AI through TSRI’s JANUS Studio (sponsored by TSRI) (MAM106-S), AI driven application modernization at scale (sponsored by Pega) (MAM103-S), or Accelerate Legacy Modernization with Slalom & AWS (sponsored by Slalom) (MAM216-S).
Toast to Transformation
The learning doesn’t stop when the sessions end— valuable insights happen over cocktails and conversations. We’ve planned two exclusive networking events to connect with fellow mainframe modernization leaders and enjoy iconic Las Vegas experiences.
AWS Mainframe Modernization Customer Cocktail Reception
December 2, 2025 | 6:00 PM – 9:00 PM PST | Madame Tussauds Las Vegas
Join us for an inspiring evening celebrating mainframe modernization success stories with fellow transformation leaders who have modernized their mainframe environments with AWS. You can look forward to an executive fireside chat, insights into how agentic AI is revolutionizing modernization projects, and networking over cocktails and appetizers. Whether you’re planning your modernization journey or enhancing your existing approach, you’ll gain valuable perspectives from those who have successfully navigated these complex initiatives.
AWS Mainframe Partner Cocktail Reception
December 3, 2025 | 5:00 PM – 8:00 PM PST | minus5° ICEBAR at Mandalay Bay
Partners won’t want to miss the AWS re:Invent Mainframe Partner Cocktail Reception. This gathering of our valued mainframe modernization partners offers an engaging fireside chat with industry peers from Accenture, Pega, and Capgemini, plus a first-look at groundbreaking AWS Transform announcements. Connect with fellow mainframe partners while enjoying cocktails and appetizers in the unique ice bar setting at Mandalay Bay.
The Fun Starts Now
The countdown to re:Invent is on! Secure your spot and plan your schedule today:
- Register for AWS re:Invent 2025
- Reserve a seat in the mainframe modernization sessions
- Join the conversation on social media using #reInvent
- Download the AWS Events mobile app to plan and navigate your re:Invent experience
Pro Tip: Session schedules are subject to change. For the most up-to-date information, visit the official AWS re:Invent Session Catalog.
See you in Las Vegas!