...if you're in a final salary pension scheme.
Many of these are in deficit so, at some point, it's likely your employer may try to lure you off to an investment-based scheme. These are usually run by pension/insurance companies and the slick salesman will want their commission.
Your employer will probably try to sweeten the deal with some tax-free cash or a single 'bonus' into the pot.
Obviously, I'm not allowed to give financial advice, but almost everyone who is currently in a final salary scheme would be better off staying where they are. There's a risk, obviously, the company may go bust, as some already have, and you could end up with a much reduced pension or even nothing.
However, most people who move will get a lower pension with no link to inflation and no protection for their partner.
My advice, which I'm not allowed to give, is to not sign anything until you've taken advice - you could be losing shed-loads off your pension.
Yep, pensions are boring. So is a diet of beans on toast...