Having an expert interest in early music practices, Chalium enjoys a very multifaceted career as a singer, organist, conductor, accompanist, lecturer, musical commentator, and teacher. He divides his musical interests between both demanding performance and teaching schedules. 

While living in Canada, Chalium served for six years as an organist and choir master. He also appeared as a soloist with many of Western Canada's leading choirs and orchestras including the Victoria Symphony Orchestra, the Victoria Chamber Orchestra, The Galiano String Ensemble and the Vancouver Island Symphony Orchestra, to name a few. Additionally, he hosted and produced his own regular radio programme, 'Classic Examples', for Canadian radio.

During his time in New Zealand, Chalium has appeared as a guest soloist with the The Handel Consort & Quire, Auckland Philharmonic Orchestra, Tauranga Civic Choir, Hamilton's Cantando and Civic Choirs, Auckland's Graduate Choir, Viva Voce Chamber Choir Chamber Choir. He has also appeared as a guest early music conductor for the Bay of Plenty Symphonia. He is currently the Church Musician in Residence for the Anglican Parish of Mount Maunganui. Chalium's expertise is frequently sought after as a concert reviewer for the Bay of Plenty Times. He also often appears as a guest lecturer for the New Zealand branches of the Royal School of Church Music. 

Chalium has also appeared as a soloist on numerous recordings including two recordings of Händel's Messiah, Bach's Weihnachts Oratorium and Vaughan-Williams' Five Mystical Songs .