Kelvin and Roslyn Nicolle are members of Wycliffe Bible Translators Australia. From 1998 to 2015 they were working with SIL in the Russian Federation. Initially they were part of a team involved in Bible translation for the Nenets people in north-west Siberia. Later they were involved in encouraging the Nenets people to develop the skills of reading and writing in their own language.

In 2007 the Nicolles relocated to St Petersburg where they were involved in support and administration for 15–20 other Bible translation teams working across the Russian Federation and Central Asia.

In mid 2015 they moved permanently back to Australia and in 2016 began new assignments with SIL Australia, teaching linguistics and supporting those preparing to go into cross-cultural work and Bible translation. This ministry builds on their past experience and is strategic to translating and delivering Scripture to people around the world in a language and form they understand best.

Their son Matthew is currently studying audio engineering at JMC Academy in Melbourne, and daughter Lena is currently in year 12 at Donvale Christian School.