Tuhia he haere tonu mo tenei whitianga - Kua mahi a Kearns i nga mahi whakawhitiwhiti korero i te Manatū Tiaki (MOD), Manatū Ture (MoJ), me te Tari a iwi ke me te Commonwealth (FCO). Ko ia te kaiwhakahaere matua mo te takoha a MOD ki te pooti motuhake o Scotland i te tau 2014
kaupapa, me ngā kaupapa whakawhitiwhiti kōrero a te kāwanatanga i Hiria me Iraki mō te FCO. I te MoJ, i mahi ia hei kaitiaki korero mo te Minita mo nga Patunga. I noho a Kearns hei kaiwhakahaere ratonga kiritaki mo te kaitohutohu whakawhitiwhiti korero rautaki a Global Influence i te tau 2016. I muri mai ka noho ia hei kaitohutohu motuhake.