The phrase "whom I advised" is correct and can be used in written English.
It is a pronoun (whom) combined with a verb (advised). You can use this phrase when you want to talk about something or someone that you provided advice to. For example, you might say: "I met a student whom I advised on his college application."
In September 2016, Amazon, DeepMind, Facebook, IBM, Microsoft and Google (whom I advised on the right to be forgotten) established a new ethical body called the Partnership on Artificial Intelligence to Benefit People and Society.
Then Governor Gray Davis, whom I've known and liked since 1980 when he was Jerry Brown's excellent chief of staff and whom I advised on space and other matters very early in his governorship, got into serious trouble midway through his first term after a landslide election and strong start as governor.
"I'm looking at the show from a museum's and collector's point of view, because that's whom I advise," Mr. Ronfort said as the two toured the show last week.
There are about 9,000 in the metropolis of whom, I'm advised, around a third are expected to take part in the one member, one vote election.
He fantasized aloud about the "ugly" justice that Texans might administer to the Federal Reserve chairman, whom I'd advise to connect through Chicago instead of Dallas for the time being.
Mr. Ailes also had close ties with Mr. Giuliani, whom he advised in his first mayoral race.
I was taught to subedit by a wonderful bunch of male, middle-aged reprobates who worked on the news pages of a national newspaper, one of whom helpfully advised me that nobody liked subs.
According to a biography by the office of the Russian president, whom he advised after the commission ended, Mr. Pristavkin had a wife, three children and four grandchildren.
Janet tells about being weighed down by luggage, about meeting young men who helped her with her bags, and about meeting young women whom she advised to marry before the age of thirty.
The study was conducted among 458 men aged 30 to 59 who had recently had a heart attack, half of whom were advised to cut their animal fat consumption and replace it with safflower oil and safflower oil margarine.
He was nicknamed "the devil's advocate" for defending "indefensible" clients from the Nazi war criminal Klaus Barbie to the Serbian president Slobodan Milosevic, whom he advised, and, briefly, Saddam Hussein.
