Strikwerda started his career as a physical therapist with the Dutch football club Go Ahead Eagles and later moved to Football Club Utrecht. When he became more famous he worked as a freelancer and did surgery on many of the great football players. He also did surgery on his own knee to show the technique and to show how easy it was to perform the surgery.
During his life Strikwerda wrote three books:
"Het doping probleem" (The problem about doping), 1968
"Blessuretijd" (Injury time), 1999,
He also wrote columns about sports injuries for Dutch football magazine Voetbal International for many years.