A 4 year college education at an ABET accredited school, even
though you can become an engineer if you do not have a 4 year
degree but it is very difficult Depending on how you define an
Engineer it can be very different. To become a Chartered Engineer
in the UK you need either: A four year MEng (Master of Engineering)
degree and real-world practice in your engineering discipline OR A
three year BEng (Bachelor of Engineering) degree, an extra year of
study (To make up an equivalent MEng) and real-world practice. Then
you take your Chartered Professional Review with you relevant
Institution (ICE, IMechE, IStructE, etc). You can still be an
Engineer without becoming chartered and this can be gained from
many different routes. The main way to determine an Engineer is
which Institution they are a member of.