Ndamukong Suh is so serious about a construction career after the NFL, he took an UNPAID INTERNSHIP to learn the ropes.
Then again, when you're making $114 MILLION ... do you really need the extra cash?
It's actually a pretty cool story ... Suh locked up a 3-day internship working for Related Companies -- a multi-billion dollar company founded by Dolphins owner Stephen M. Ross.
Okay, so maybe Suh got the hookup 'cause he's tight with the boss man -- but sources connected to the internship tell us Suh is very serious about construction (it was his major at Nebraska).
We're told Suh visited several construction sites -- including a new $15 BILLION project in lower Manhattan -- and has been allowed to attend important building meetings.
A rep for Related tells TMZ Sports ... "Mr. Ross believes in making himself available to all of the players as they explore their post football career interests in the off-season. Ndamukong expressed a keen interest in real estate and is here at Related and Hudson Yards for an intense three day internship.”