The board of Rainbow's End said it was delighted with the appointment and was looking forward to working with Crabb.
"I am looking forward to working with the team to continue evolving their strategy and plans. Continuing to deliver a fantastic customer experience will be a core focus for the team, along with continued capital investment to ensure the park is modern and relevant for guests," Crabb said.
The theme park is a subsidiary of Rangatira Limited, a Wellington-based investment company.
Crabb has been working at Lion for more than 15 years.