Simpson will be mainly representing the Whanganui Multisport Club, while Gruebsch will work on behalf of the Wanganui Cycling Club, the Taumarunui Cycling Club, the Ruapehu Mountain Bike Club and the Wanganui Mountain Bike Club.
German-born Gruebsch has lived in New Zealand for nine years and has settled in Wanganui with his wife and two children.
Coming from a country where cycling remains a key mode of transport, he would like to see more people in this town using two wheels more often for both convenience and recreation.
He is also keen to see Wanganui viewed as an attractive destination for tourists using the national bike trail.
Gruebsch has a Sports Science degree with honours and is a New Zealand-trained and qualified secondary school teacher.
Simpson originally hails from Wyoming in the United States, but has been in New Zealand with her young family for 11 years.
She wants to see growth in all areas of kayaking, triathlon and multisport in the city.
"My own participation and passion for kayak and multisport drives my desire to take an active involvement in promoting and growing the sport throughout the Wanganui region."
In a three-year initiative, the officers are tasked with increasing the club's junior participation, creating opportunities for competition and skill development, and increasing and upskilling coaches, officials and volunteers.
While they will naturally be out and about a lot, the pair will be based in the Sport Wanganui offices in Maria Place.