Read the Western Canadian Game Warden Magazine, meet your local officers, go to school and try to get summer jobs in the field of study. Fish and Wildlife Officers are not allowed to take people out on ride-a-longs any more but most are approachable and generally happy to chat.
It used to be very difficult to get a job as an officer due to few positions and lots of competition, not so these days. Every agency is hiring and competing for qualified people. Alberta has held an academy every year for the past 3 or 4 years, including this year and have had more positions then qualified applicants.
A degree from Lethbridge is accepted everywhere and there are lots of opportunities in this field.
You have to pass a medical, psychological exam, eye exams, pass their fitness test and rigorous internal training but if successful it is a great job, very rewarding (except financially, you won't get rich being a Game Warden unlike what you might read in the media LOL) huge variety in duties and you never know what the next call will bring.
It requires working weekends and varied shifts, some politics that can be an irritant but a great job with lots of variety, an awesome career choice.
Good Luck!