original: Since 1980 the senior pastor has been John Piper.
simplifications: John Piper has been the senior pastor since 1980. John Piper is the senior pastor. He has been since 1980. John Piper was a senior pastor since 1980. John Piper has been the lead pastor since 1980. John Piper is the senior pastor. He has held the position since 1980. John Piper has been the senior pastor since 1980. John Piper has been the senior pastor since 1980. John Piper has been senior pastor since 1980. John Piper has been the senior pastor since 1980. Since 1980 the higher (in position) person running the church has been John Piper rev.