Mick Billmeyer, Rich Dubee and Juan Samuel will return, while Sandberg, Steve Henderson and Rod Nichols were promoted from within the Phillies system.
The club previously did not renew the contracts of Greg Gross, Pete Mackanin and Sam Perlozzo.
Sandberg, who was elected to the Hall of Fame in 2005, becomes the Phillies' third-base coach and infield instructor. The 53-year-old was 439-409-1 in six seasons as a Minor League manager in the Cubs and Phillies organizations and is viewed by many to be a potential Major League managerial candidate.
Billmeyer, the longest-tenured member of the Phillies coaching staff, was promoted to catching coach after serving as bullpen coach (2009-12) and Major League catching instructor (2004-08).
Dubee remains as pitching coach for a ninth straight season, with 2013 marking his 12th year in Philadelphia.
Samuel will be the club's first-base coach and outfield/baserunning instructor after spending the past two seasons as third-base coach and outfield instructor. He was a two-time All-Star during his time as a Phillies second baseman from 1983-89.
Henderson, 61, was promoted to hitting coach after spending the past three seasons working in the organization as the hitting coordinator (2011-12) and outfield/baserunning coordinator (2010). Henderson spent 12 years in the Majors as a player and also was the Rays' hitting coach from 2006-09.
Nichols, 47, becomes bullpen coach. He has worked in the club's Minor League system since 2000, previously serving as pitching coach for four different affiliates, including the last eight at Triple-A, and pitched parts of seven seasons in the Majors.