u/PSR-Info

Some organizations go fully outsourced (hardware, software, operations, DR, support, the whole environment) while others keep ownership of hardware and software but bring in managed services for day-to-day operations.

For teams that have evaluated both models, I'm curious what made the biggest difference in the decision, whether it came down to cost, control, compliance, staffing, risk, or internal politics. Did full outsourcing simplify things or raise concerns about visibility and flexibility? And does managed services make more sense when a company wants to retain control but needs deeper operational coverage?

There's probably no one-size-fits-all answer, so I'm interested in how people are weighing these tradeoffs.

We’ve heard different versions of this story over the years: a company plans to be off the mainframe in 5 years, then 5 years becomes 10, and the new timeline is still another 3–5 years out. Not saying migration is impossible, but the original estimates often seem to underestimate the operational reality.

For anyone who has been part of a mainframe migration or modernization effort:

• What usually causes the timeline to stretch? Is it application complexity, business logic, integrations, testing, cost, staffing, or leadership underestimating how embedded the platform really is?
• And for teams that did move major workloads off, did the end result match the original business case?

This feels like one of those topics where the boardroom version and the hands on version are often very different.

We’ve been talking more about the mainframe talent pipeline lately, especially around systems programming. There’s still a lot of outside perception that mainframe is “old tech,” but the actual need for people who understand z/OS, infrastructure, performance, security, and operations does not seem to be going away. If anything, the challenge seems to be finding people who are willing to learn it.

For those closer to the hiring/training side:

• Would you recommend mainframe systems programming to a recent college grad?
• Are companies doing enough to train newer people, or are most teams still relying on senior people to keep things moving?
• When younger engineers get real exposure to the platform, do they usually see the career upside, or is it still a hard sell?

Trying to get a better read on whether this is still one of the more overlooked career paths in enterprise IT.