Short answers, pulled from the story.
Sextus Julius Frontinus was a Roman civil engineer, author, soldier, and senator born around 40 AD. Scholars infer he was of Narbonese origins and originally belonged to the equestrian class.
Frontinus served as governor of Britain between AD 70 and 77 when Gnaeus Julius Agricola succeeded him. He participated in the suppression of the Rhineland revolt in AD 70 before holding this office.
Emperor Nerva appointed Frontinus curator aquarum in 97 AD. The following year he held a second consulship as suffect in February with Trajan as his colleague, and two years later became consul ordinarius alongside Trajan.
Frontinus prepared maps of Rome's water system to assess their condition before maintenance began. He made a meticulous survey of each line's intake, investigated discrepancies, and enforced existing laws governing state aqueducts.
His extant work Strategemata collects examples from Greek and Roman history for generals based on his experience in Germania. De aquaeductu presents history and description of Rome's nine aqueducts at the turn of the 1st century AD including laws relating to use and maintenance.