He has won the World champion gold medals for the Water Running 2004, Iron Bar Walking 2012 and Bog Snorkelling 2012, and Kicksled 2014 and was also the winner of the Wife Carrying World Championships in 2009, 2010, 2011, 2012, 2013, 2017, 2022 and 2023.
CraveOnline has 2012 chosen Miettinen as the world's greatest reigning stupendous unknown champion number 1.
Miettinen has been selected as the first Finnish Folkparty member of the municipal council in 2012 for the period 2013–2016 in the city of Kauniainen.
Miettinen has performed in numerous domestic and foreign TV programs and has been a guest on the Live with Kelly and Michael show.
He is a lawyer and licentiate of science (economics) and he has written a book on corporate tax minimization arrangements.