Greetings!
The minimum qualification needed is a graduation in wildlife/ zoology/ biology/ ecology. Many universities offer this particular branch of study for the interested aspirants. To get into the high designation job in this field, a post graduation or PhD in the same is required.

Here is a list of colleges offering B.Sc in Wildlife Biology and related courses:

• College of Forestry, Kerala.
• Manipur University, Imphal.
• Wildlife Institute of India, Dehradun.
• National Centre for Biological Sciences, Bangalore.
• Forest Research Institute (Deemed University), Dehradun.

I hope this was helpful. Thank you!