The phrase "as a delegate for" is correct and usable in written English.
You can use it when referring to someone who is representing another person or group in a formal capacity, such as at a meeting or event.
Example: "She attended the conference as a delegate for her organization, advocating for environmental policies."
Alternatives: "on behalf of" or "representing".
She backed Senator John McCain's 2000 presidential bid and served as a delegate for him at the Republican National Convention.
Thiel had previously served as a delegate for Trump and delivered a keynote address at the Republican national convention.
The Trump campaign in May announced the Silicon Valley billionaire would serve as a delegate for the presumptive Republican nominee in Cleveland this summer.
When a Guardian reporter mentioned Thiel's role as a delegate for Donald Trump, one person close to the billionaire asked if that was "real" and if Thiel had publicly confirmed it.
Appointed inspector general of the new Austrian Army after the fall of the empire in November 1918, he retired two years later, joined the Social Democratic Party, and, between 1925 and 1934, sat as a delegate for Vienna in the Austrian Bundesrat (upper chamber in the federal parliament).
In 1976, the year he was elected to the Senate, he was close to the hawkish wing of the Democratic Party — he went to the Convention as a delegate for Henry (Scoop) Jackson — but he built his own nest in the aviary.
As a delegate of HUPO, for human proteome on children assays and studies, we, at Hospital Universitario Niño Jesús, are seeking to support the human proteome in this context.
In the meantime, Thiel will be heading to the Republican convention next month in Cleveland as a California delegate for--you guessed it--Donald Trump.
He also served the University as a delegate of the University Press for 5 years, a rather terrifying body, which meets regularly each term and has the last word on which books should be published by the Press.
Manafort has been in politics for pretty much his entire life; when he was 27, he worked the 1976 Republican Convention as a delegate handler for Gerald Ford.
I make reference to my Dad, who spoke in 1955, as a delegate, calling for the nationalisation of the means of production.
