The phrase "already resigned from" is correct and usable in written English.
It can be used when indicating that someone has formally left a position or job prior to the current time.
Example: "She has already resigned from her position at the company, effective immediately."
Alternatives: "has already stepped down from" or "has already left".
Webb had already resigned from the Mercury News, however.
In response to the verdict, some Italian scientists have already resigned from key public safety positions.
Both men had already resigned from the team, on Sept. 16.
The company said that three senior executives who had previously lost their roles had already resigned from the board and from the company entirely.
These talks are still in progress, these people said, although according to one of them, Mr. Barnett has already resigned from Sony.
Protesting his innocence, he has already resigned from the IMF, which now needs a new head; and France will have to rethink the presidential campaign that is at hand.
Ms. Short, 57, had already resigned twice from the Labor front benches in her 20-year parliamentary career, and she was known for her passionately held views and held up by her followers as the conscience of the government.
The previous mayor and several town officials had already resigned after threats from drug traffickers and complaints that the police were ineffective; the state and federal authorities took over enforcement because the 60-member police force was believed to be enmeshed in crime.
Anderson had already resigned in September from his position on the Texas bench.
It has already changed its name once during its two-month existence and one prominent board member, Richard D. Parsons, the chairman of Citigroup, has already resigned, possibly under pressure from public employee unions.
A fourth had already resigned.
