Career
Growing up in Amsterdam, De Boer signed up with local club in 1911, joining the club"s youth ranks at 13 years of age. Nine years later, under coach Jack Reynolds, De Boer was able to replace former first team goalkeeper January Smit in goal. After 1933 De Boer remained active at, playing as an outfield player for 6, one of the club"s amateur teams playing in the lower leagues of the Netherlands.
De Boer received several call-ups for the Dutch national team, but was only capped a total of five times between 1923 and 1924.
He was a part of the Dutch Olympic football team at both the 1924 Summer Olympics and the 1928 Summer Olympics but did not make any appearances for the team at either of the games. He was the back-up goalkeeper for the Netherlands national team behind Gejus van der Meulen until his retirement from the national team in 1932.
Outside of his football career, De Boer was responsible for the brand of fire extinguishers, which he helped develop that were later marketed and sold worldwide.
