 On 17 January 2017, with the arrival of Marco Silva, who brought his own backroom staff, the club announced that Pennock had left the club.On 7 April 2017, Pennock joined Welsh Premier League club Aberystwyth Town as assistant manager but was made permanent first team manager in May 2017 after the departure of Mathew Bishop.In June 2017, Pennock left his role as Aberystwyth manager after less than a month in charge to return to Hull City as first-team coach.