Padung Limcharoenrat was appointed to replace Aree Krainara, former chief guard of the United Front for Democracy against Dictatorship (UDD), the Red Shirt movement.
Ms Thitima said she was appointed the prime minister's deputy secretary general for political affairs. The Cabinet also assigned her to work as a caretaker government spokesperson.
In addition, Shinnawat Haboonpad, was appointed an advisor to the transport minister, while Wan Yubamrung, a son of Deputy Prime Minister Chalerm Yubamrung, was appointed an advisor to the deputy transport minister.
Other postings are Sombat Rattano, as advisor to the deputy transport minister, Surachet Chaikosol as a secretary of the transport minister, and Wichienchanin Sinthuprai, as an assistant secretary of the deputy transport minister.