Put together by Nene Park Trust and Cross Keys Homes, the course is open to anyone aged between 18 and 24 who is not in education, experience or training.
Participants will shadow current park rangers at the Peterborough site as they go about their work in the park, gaining insight into the role while learning transferable skills for the future.
Some of these skills will include tending trees in the park's onsite nursery, maintenance of the Native Tree Trail and willow maze, woodworking and willow weaving.
The chief executive of the Peterborough social housing association Cross Keys Homes (CKH), Claire Higgins, said: "This is a wonderful opportunity for young people to get outdoors and learn about a role they may never have thought about before.
"So many young people who have struggled in a formal learning environment find new talents and interests when doing practical work outdoors.
"We hope this course will open doors for young people to find fulfilling careers in a sector that they may not have previously considered."
Andrew MacDermott, head of development at Nene Park, said: "We are delighted to be working with CKH to identify young people to take part in this project.
"It’s a fabulous chance for young people to come and see behind the scenes at the Trust and experience the role of a ranger first hand.
"For people interested in the environment or a career in conservation, this is a great way to get an insight, learn some new skills and plan their path for their future."
The course is being funded by the National Lottery Heritage Fund as a #YourCommunityGreenspace project, and will start on June 8, running every Tuesday for five weeks.