Someone with a hands-on way of doing things becomes closely involved in managing and organizing things and in making decisions.
Someone who has hands-on experience of something has done or used it rather than just read or learned about it.
"Hands-on investor" is an investor who has a large stake in a corporation and takes an active role in its management.
2.) Many employers consider hands-on experience to be as useful as academic qualifications.
3.) She's very much a hands-on manager.