On January 28, 1963, one month after winning their second straight NFL title, the Green Bay Packers hired Peppler as director of player personnel, where he worked with head coach Vince Lombardi in helping continue a talent pipeline that won three more championships, including their first two Super Bowls.
Even before Lombardi left following the 1967 NFL season, however, Peppler's talent for player procurement stumbled as the team failed to replace the host of future Pro Football Hall of Famers that dotted the roster.
In his first two years with Miami, Peppler was part of consecutive Super Bowl championships, a stretch that included a perfect 17–0 campaign during the 1972 NFL season.
Looking to build around the first pick in that year's draft, quarterback Steve Bartkowski, Peppler saw the team finish 4–10 under Marion Campbell during the 1975 NFL season.
Despite the promise shown in the final two months of the season, which included the upset of the Dallas Cowboys, Peppler's uncertain future forced him to look for other job openings.