Fellow of the UK Institution of Engineering and Technology (FIET) is the highest grade of Institution of Engineering and Technology membership,[1] awarded to those who have sustained high levels of achievement, for several years.

Applicants include senior engineers, researchers, and technology leaders from industry and accomplished professors from universities.

Prior to the name change of IET, Fellows had the post-nominal letters of FIEE.

Existing fellows of IEE automatically became FIET when the engineering institution changed its name in 2006.

[3] As of 2016[update] examples of fellows include Muffy Calder, Wendy Hall, Andy Hopper, Lajos Hanzo, and Martin Sweeting.