HOBOKEN, N.J. – April 24, 2025 — Semperis, a leader in AI-powered identity security and cyber resilience, today announced that Guido Grillenmeier, Principal Technologist, EMEA, will be speaking at the RSAC 2025 Conference on The Microsoft Cloud Identity Crisis

What: The Microsoft Cloud Identity Crisis

When: Tuesday, April 29, 2:25pm – 3:10pm PT

Where: RSAC 2025, Moscone West, 3001

Who: Guido Grillenmeier, Principal Technologist, EMEA

Why: For many years, Microsoft has successfully promoted cloud services and identities, leading to widespread adoption of hybrid identity models. However, cybercriminals increasingly target cloud identities, posing significant risks. This talk highlights the potential crisis businesses face when recovering Microsoft cloud identities after an attack and offers strategies to better prepare for such scenarios.

Guido Grillenmeier is the Principal Technologist of Semperis in EMEA. Based in Germany, Grillenmeier has been a Microsoft MVP for Directory Services for 12 years, helping organizations across industries secure their Active Directory environments and supporting their transition to Windows 10/M365 and Azure cloud services. He spent more than 20 years at HP/HPE as Chief Engineer. A frequent presenter at technology conferences and contributor to technical journals, Grillenmeier is the co-author of Microsoft Windows Security Fundamentals.

In addition, Grillenmeier will be hosting a Birds of a Feather session, Critical Role of Identity Security in Business Resilience: Myth or Reality, on Tuesday, April 29, 9:40 am in Moscone West 2012. He will explore how reliant businesses are on well-secured corporate identities and whether they could continue to operate if these identities were compromised. Grillenmeier will explore these questions and discuss strategies to better prepare for such critical situations.

Semperis at RSAC 2025 Conference: Throughout RSAC week, visit Semperis inside the W Hotel’s first floor lounge, in the Moscone Center’s South Hall Booth #3424 or other locations.

Monday, April 28, 7:00pm – 11:00pm

Kickoff Party at the San Francisco Museum of Modern Art

Semperis is co-sponsoring the Trellix Kickoff Party

Tuesday, April 29, 11:00am – 12:45pm and 2:00-3:30pm

Meet and Greet with Pro Racer Townsend Bell

South Hall, Booth #3424

Townsend Bell is a professional racing car driver, sports commentator, and Lexus ambassador. He will be signing autographs and taking pictures with fans.

Tuesday, April 29, 3:00pm

Speaking Session with Darren Mar-Elia, Semperis’ AVP Products

Cohesity Booth S-0543
How to Protect Business-Critical Data from Cyberattacks


Wednesday, April 30, 12:00pm
Speaking Session with Darren Mar-Elia, Semperis’ AVP Products

Trellix Theater, Booth N-5644
Prevention Alone Isn’t Enough: How EDR and ITDR Provide Layered Defense Against Identity-Based Attacks

To learn more about Semperis and their award-winning hybrid identity security resilience products and services, visit: https://www.semperis.com.

About Semperis 

Semperis protects critical enterprise identity services for security teams charged with defending hybrid and multi-cloud environments from cyberattacks, data breaches, and operational errors. Purpose-built for securing hybrid identity environments—including Active Directory, Entra ID, and Okta—Semperis’ AI-powered technology protects over 100 million identities from cyberattacks, data breaches, and operational errors.

As part of its mission to be a force for good, Semperis offers a variety of cyber community resources, including the award-winning Hybrid Identity Protection (HIP) Conference, HIP Podcast, and free identity security tools Purple Knight and Forest Druid. Semperis is a privately owned, international company headquartered in Hoboken, New Jersey, supporting the world’s biggest brands and government agencies, with customers in more than 40 countries. 

Learn more: https://www.semperis.com

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Media Contact:

Bill Keeler 
Senior Director, PR & Comms 
Semperis 
billk@semperis.com