He studied Production Engineering at Trent Polytechnic in Nottingham (now Nottingham Trent University) from 1982-86.
Maier has occupied senior posts with Siemens, including industry sector lead for the UK and Ireland and Manufacturing Director of the Drives Factory in Congleton, Cheshire. He became a member of the Siemens UK Executive Management Board in October 2008, and was appointed Chief Executive on 1 July 2014.
He is a Fellow of the Institution of Engineering and Technology (IET) and the Royal Academy of Engineering, as well as receiving Honorary Doctorates from the University of Manchester (where he is also a visiting professor), the University of Salford , the University of Lincoln and Nottingham Trent University.
He became a non-executive board member of the Department for Business, Innovation and Skills (BIS) of the UK government in September 2014  and has since led the Made Smarter industrial strategy initiative which supports advanced digital manufacturing.
In 2019, Insider Magazine named Maier as the most influential business person in North West England..
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- Ltd, Insider Media. "Big names make Power 100". Insider Media Ltd.