"With Sharon and Peter we have two people who have 'been there and done that' as players on the international stage.
"Both Sharon and Peter also have a real passion for coaching and having these three quality people on board is extremely pleasing."
Sims was a gold medallist in the pairs at the 2002 Manchester Commonwealth Games.
Belliss won Commonwealth bronze medals at the 1994 Victoria games (men's fours) and 1982 Brisbane games (singles).
He won World Championship gold in 1984 (singles), 1988 (doubles) and 2000 (triples).
The appointment covers a number of international tournaments, culminating in the World Championships in Christchurch in November 2016.
"With the World Champs on our home greens in 2016, expectations of the total team are very high," said Clark.
"We strongly believe we have appointed a selection and coaching panel that will deliver our players in the best possible form to ensure we bring multi-gold medal results back to New Zealand."