Subject + 担任 + Role
担任 (dānrèn) means "to serve as" or "to hold the position of" and is a formal verb used to describe taking on a role or responsibility. It is followed directly by the role or title, without needing 作为 or other linking words. It is common in biographical descriptions and official contexts.
她担任这家公司的首席执行官已经三年了。
Tā dānrèn zhè jiā gōngsī de shǒuxí zhíxíng guān yǐjīng sān nián le.
She has been serving as the CEO of this company for three years.
他曾经担任过学校篮球队的队长。
Tā céngjīng dānrèn guò xuéxiào lánqiú duì de duìzhǎng.
He once served as the captain of the school basketball team.
李教授目前担任研究中心的主任。
Lǐ jiàoshòu mùqián dānrèn yánjiū zhōngxīn de zhǔrèn.
Professor Li currently serves as the director of the research center.