"express his concerns" is correct and commonly used in written English.
For example, "The teacher asked the student to express his concerns about the lab experiment."
At the book fair, Watson pulled De Caro aside to express his concerns.
Mr al Fayed hired QC David Holgate to express his concerns at the meeting.
Adair met President George Bush the following day to express his concerns, and got a pledge of support.
While the new French president, François Hollande, was in Germany to express his concerns about excessive austerity with Chancellor Angela Merkel, the dissolution of the Greek state accelerated.
The next day, he e-mailed Sambol to express his concerns that borrowers were misstating their income, and that a greater number of defaults were likely.
The chief minister of the state, Ashok Gehlot, met India's home minister, Palaniappan Chidambaram, on Tuesday to express his concerns about Mr. Rushdie's visit.
The American ambassador was wheeled out to express his concern.
At one point in the day, Mr. Bush also called Mr. Fleischer to express his concern.
Ms. Habib said Prime Minister Marouf al-Bakhit called to express his concern over what happened.
Mr. Menendez, Democrat of New Jersey, wrote the Treasury secretary, Timothy F. Geithner, in June to express his concern.
Had he expressed his concerns to colleagues? "I tried to.
