2026 – Rui Miguel Feio

GS | Forge26: Four Days, Hundreds of Mainframers, and a Future That Refuses to Stand Still

5th November 2026 Rui Miguel Feio

Whittlebury Hall, Northamptonshire | 2–5 November 2026 Four days, hundreds of mainframe professionals, an impressive amount of technical knowledge, countless cups of coffee, and probably more than a few conversations that started with “back in my day…”. Welcome to GS | Forge26. The GS-UK Conference returned to Whittlebury Hall in […]

Useful RACF, ACF2 and Top Secret Commands for Security Administrators

2nd November 2026 Rui Miguel Feio

In this article we will look at common user administration, data set protection and resource access tasks, with an example for each command. Note that these are simplified examples. The manuals linked throughout the article provide the complete syntax and authority requirements. Although the three products perform similar functions, their […]

Quantum Computing and the Mainframe: A Threat, an Opportunity, or Both?

26th October 2026 Rui Miguel Feio

Quantum computing has been attracting considerable attention over the past few years. Some believe it will revolutionise computing. Others question how long it will take before the technology delivers meaningful commercial benefits. And, as with almost every major technological development, there are already predictions about which existing technologies it will […]

When AI Meets RACF: Can an Authorised Identity Become a Security Risk?

19th October 2026 Rui Miguel Feio

For decades, mainframe security has relied on a fundamental principle: before a user or application is allowed to access a protected resource, the system must determine whether the appropriate authority exists. On z/OS, the System Authorization Facility (SAF) provides a common interface through which resource managers can request security services. […]

AI Gone Wild: When Artificial Intelligence Stops Following the Rules

14th October 2026 Rui Miguel Feio

I have just come across a rather interesting documentary on Netflix called Instadocs: AI Gone Wild. The documentary examines a cybersecurity incident involving AI agents developed by OpenAI that managed to bypass restrictions in their testing environment and compromise systems belonging to Hugging Face. At first, this might sound like […]