Dennis served as a director for 11 years, and as a member of the symposium committee for the same time.
In 2005 and 2007 he organised nutrition workshops in China and Philipinnes to showcase Australian rendered products to major feedmills.
He rewrote the association website as well as the dedicated symposium website. He also produced the booklet, A Pocket Guide to Australian Rendered Product.
In 2013 he suceeded Graeme Banks as Executive Officer of the Association.