Universities typically have a Placement Office where employers can list openings, recruit new/recent grads. Obviously, they only recruit from a very few schools - e.g. the highest rated school in that field, or local employers will recruit at the local university.
You're expected, by the time you graduate, to be sufficiently astute & adult to take full responsibility for yourself. Including learning practical skills like how to write a resume & cover letter, research job openings, interviewing skills, etc. NO school is going to find you a job. YOU do all the research, job hunting, etc. The Placement Office may be one resource for advice, but they are not going to find you a job or do any legwork for you.
BTW, start doing your homework NOW. Which universities have the highest rated programs in wildlife biology? And expect to need at least a master's degree. And check out the US National Park Service - what are they looking for in park rangers & various specialists these days? Who else looks for wildlife biologists & what, exactly, do they expect?