What does a certifier do? Get to know more on the first episode of Who's in the Zoo with Peter Hofstetter. He has been a building certifier since 1994 and for the past 27 years, he specialised in commercial buildings which include shopping centres, laboratories, hospitals, age care, educational and industrial buildings, high-rise offices, and residential towers. He is the founding director of a building certification company that began in 2000 and specialises in the commercial market sector and invented a tool that quickly and accurately measures the rising and going of stairs. He is a believer in having empathy with fellow disciplines and designers which makes him a perfect guest speaker in the show.