In 1787, through his wealthy patron William Pulteney, he became Surveyor of Public Works in Shropshire. Civil engineering was a discipline still in its infancy, so Telford was set on establishing himself as an architect. His projects included renovation of Shrewsbury Castle, the town's prison (during the planning of which he met leading prison reformer John Howard), the Church of St. Mary Magdalene, Bridgnorth and another church, St Michael, in Madeley. Called in to advise on a leaking roof at St Chad's Church, Shrewsbury in 1788, he warned the church was in imminent danger of collapse; his reputation was made locally when it collapsed 3 days later, but he was not the architect for its replacement.