Melaka UMNO Youth chief, Zali Mat Yasin and MCA national organising secretary Datuk Yoo Wei How were sworn in as senators for their first term before Dewan Negara president Tan Sri Abu Zahar Ujang.
Zali, 41, who is president of the Hang Tuah Jaya Municipal Council of Melaka, held the post of deputy director of the Melaka Sports Council last year.
Yoo, also 41, who is executive director of Trans Inn Sdn Bhd, had served as the political secretary and press secretary for several ministers between 2003 and 2009.
Datuk Lihan Jok, former vice-president of Parti Pesaka Bumiputera Bersatu (PBB) Sarawak, was sworn in as a senator for the second term.
Lihan, 57, who is the principal advisor of the Federation of Orang Ulu Associations of Sarawak, Malaysia (FORUM), had served his first term as a senator for three years up to Sunday.
He was the Telang Usan state assemblyman for two terms, from 2001 to 2011.