See hands-on in Webster's New World College Dictionary
adjective
designating or of training, an activity, etc. in which a person actively participates by design
designating or of a manager, administrator, etc. who intervenes or otherwise actively participates in the execution of a task or activity
See hands-on in American Heritage Dictionary 4
(hăndzˈŏnˈ, -ônˈ)
adjective
Involving active participation; applied, as opposed to theoretical: “We're involved in hands-on operations, pulling levers, pushing buttons”(Arthur R. Taylor).