Just to everyone saying it's a lenient sentence:
The guys fucked anyway.
He lost all his retirement fund and very likely a lot of personal money (/everything) as the police can charge him for some of their costs and lawyers and shit are expensive.
He will have to pay for his own private health insurance when back out and is not eligible for public insurance anymore.
And he is ineligible for a lot of jobs as he won't pass the most basic background checks, he won't even be allowed to drive a school bus until he is at an age that he needs to retire anyway. Even amazon will not hire him.
Basically he fucked his whole life over. For what? For things the Russian intelligence services very likely already knew.
(And no, tbh, I feel no pitty for him. I am all for resocialisation, but this way intentionally and beyond stupid)