encore career
n.— «Civic Ventures, a group Lakin said encourages older adults to pursue a higher level of education to rejoin the work force and attain what they refer to as “encore careers,” is one of many organizations targeted at this specific age group.» —“Baby boomers come back to college” by Taylor Cox in University of Wisconsin-Madison Badger Herald Jan. 20, 2009. (source: Double-Tongued Dictionary)