According to his biography, Geoff Marsh has been a solid and steady right-handed opening batsman who is able to work like a fielder and he makes the first class debut when he was playing under Western Australia at 19th years old. It was in 1977 and 1978 during a Sheffield Shield season. During the year 1978, he was playing five games in Australia rules football while playing for Fremantle during West Australian National football league and it was before concentrating only at Cricket.

Geoff Marsh had established himself like solid competitor when it comes to domestic front and he was on the fringes of the national team for some years before the time he won Australian Test Team. He made the debut during the year 1985 while playing with India and he was a part in New Zealand Tour. His debut in the domestic games was not that impressive but afterwards, he was able to score a golden pair while playing for Western Australia for the first time and the game took place at Sydney Cricket Ground and it was recorded in a hand-written form at a storing cabinet within inside of the dressing room of the team. It was meant to be a domestic honors board.

Afterwards, he turned to be the player for opening position while batting together with people like David Boon and Mark Taylor and afterwards, he became an important person in the team of One Day International in Australia. He played at the international level for over 7 years and it ended in 1992. He will be remembered for the part he played for Australian Team which won 1987 World cup that took place in India and this included 126 unbeaten while playing against New Zealand at Chandigarh. He was a captain for his team for four matches. During his career, he came to be known as a solid performer for the One Day international Cricket and he has a batting average of over 40 but, he had a low strike rate in comparison with other batsman of his time.

Geoff Marsh has two children who are playing Test Cricket. They are Shaun Marsh who started his test debut while playing with Sri Lanka and Mitchell March who played with Pakistan. His daughter Melissa Marsh is playing basketball under WNBL. His family has achieved a successful level in sports. Even if it is known that he is a married, the name of his wife is not known, the same as his net worth.