1982- A few couples from Lebanon Valley Bible Church began meeting in family homes in the Robesonia, PA area in order to plant a church.
1990- The church became officially incorporated as Heidelberg Bible Church. Scott Brady became pastor in September.
1991- Construction began on a new building in Mount Aetna, PA. The church name was changed to reflect the new location.
1994- MABC celebrated their first service in the new facility. The church supported seven missionaries.
2000- Tim Bouffard became co-pastor.
2005- Mount Aetna Bible Church planted a church in the Robesonia area where it first began. This church again took the name Heidelberg Bible Church.
2006- New education/office wing completed.
2007- Rick Hemphill was hired as part-time administrative pastor. By this time the congregation supported 17 missionaries in 15 countries, and several local ministries.
2015- Matt Talladay joined the pastoral staff to focus on young adult and youth ministries.
2017- Derek Pearsall joined the staff to shepherd music and worship ministry.