|Date of birth||10 December 1922|
|Place of birth||Roosendaal, Netherlands|
|Date of death||5 May 2012(aged 89)|
|Place of death||Roosendaal, Netherlands|
Knobel was born and died in Roosendaal. He was the coach of the Netherlands national football team for 15 matches (9 wins, 1 draw, 5 losses) from 1974 to 1976. During his period the Dutch finished third at the European Championship of 1976. He also coached Dutch clubs AFC Ajax and MVV, including a temporary spell from march to April 1982. He had a brief stint with Seiko SA in Hong Kong.
- Oranje-wit. "Oud-bondscoach George Knobel op 89-jarige leeftijd overleden – Sport Algemeen – Sport – bndestem". Bndestem.nl. Retrieved 6 May 2012.
- "Knobel tijdelijk coach van MVV - NDC|VBK - De Krant van Toen". Archiefleeuwardercourant.nl. Retrieved 19 April 2014.
- "Knobel weg bij MVV - NDC|VBK - De Krant van Toen". Archiefleeuwardercourant.nl. Retrieved 19 April 2014.