Yoon Chang-jung told reporters critics who say the team is too heavily weighted toward the right are speaking "for opposition's sake," Yonhap news agency reported.
The daughter of Park Chung-hee, an Army general who came to power in a 1961 coup and ruled for 18 years, Park was the candidate of the conservative Saenuri Party.
Park's final appointments to her team, announced Friday, included former Defense Minister Kim Jang-soo, who is responsible for foreign affairs, security and North Korean policy. She also said she will send Rep. Rhee In-je to the World Economic Forum in Davos, Switzerland, as her representative.
"It is an undeniable and objective fact that President-elect Park Geun-hye was very meticulous in naming personnel for the transition team with a basic philosophy for national unity," Yoon said.
Park's five-year term begins Feb. 25.
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