Director Samantha Grant-Smith said giraffe and zebra heads are among the incredible masks Rutgers has crafted.
"Walt Rutgers is the amazing creator, who has helped transform the school hall, and also created some amazing animal costumes including a Pumba creation worn by a Year 7, Max Reitberg," she said.
HNI music director Mary McHattie said the Lion King requires masks and costumes to have the effect on audiences it does.
"The masks he had created are absolutely stunning and the whole cast has been buzzing since they put them on. Walt's commitment to musical theatre is truly valued. He is one of the unsung heroes that we need to acknowledge and celebrate," she said.
Rutgers also recreated Pride Rock, Scar's Cave and a baobab tree along, with stage wings and a backdrop to bring the savannah to school for three nights.
The show involves a cast of about 50 Years 7 and 8 students.
It will run for three nights at 7pm, from Wednesday-Friday, December 1-3.