Marine insurance executive Howard Burnell has been given a 12-month community order after being convicted of an assault charge by Wimbledon Magistrates court in London.
Burnell, 62, was formerly head of marine and energy liability at Apollo Insurance, where he was also a director.
He was forced to leave his position after the assault on his girlfriend outside his London home in March last year.
Burnell, a well-known figure in London marine insurance circles, had been recruited from Amlin in 2015 as Apollo targeted growth in the marine markets.
But his defence counsel at the trial suggested he may not work again following his conviction.
"He lost his employment. He fell foul of the regulatory body and was dismissed and lost a substantial amount of equity in that partnership when this case was reported," said defending counsel Neville Gray.
"He does not envisage ever being able to work again after working in the industry for many, many years and is deeply ashamed and apologetic for what happened."
According to reports of the trial, Burnell had grabbed his girlfriend by the throat in the assault in an argument following dinner.
As part of the sentence, Burnell will be electronically tagged for three months between 7pm and 7am.
He must also attend a 15-day Probation Service-approved rehabilitation. He is also subject to a restraining order, preventing him from seeing his former girlfriend.
Apollo said "Apollo can confirm that Howard Burnell has left the business. There will be no further statement from Apollo."
