A victim came forward in 2019 prompting Staffordshire Police to launch an investigation into the 63-year-old.
Sterry stood trial at Stafford Crown Court and was found guilty by a jury of 11 counts of indecent assault, which involved attacks on several girls, on March 7.
A Staffordshire Police spokesman said: "A man has been convicted of 11 counts of child sexual offences in Staffordshire.
"Stephen Sterry, 63, of Imingham, East Lincolnshire, was found guilty by a jury following a trial at Stafford Crown Court of 11 counts of indecent assault of a girl.
"The historic offences happened a number of years ago in Tamworth.
"An investigation was launched into Sterry in 2019 after one of the survivors bravely came forward and told us what had happened.
"We worked tirelessly to capture ...