Dr Gollins has been a Consultant Clinical Oncologist based at the North Wales Cancer Treatment Centre since June 1998 and has been Clinical Director of Oncology for Betsi Cadwaladr University Health Board since 2010. In his NHS practice he is responsible for regular outpatient clinics at the North Wales Cancer Treatment Centre and Wrexham Maelor Hospital.
As a Clinical Oncologist he is responsible for treating patients with cancer with both radiotherapy and chemotherapy and his subspecialty interests are upper and lower gastrointestinal cancer, pancreaticobiliary cancer, head and neck cancer and thyroid cancer.
Since 2005 Dr Gollins has been North Wales Clinical Lead for the Wales Cancer Research Network and in 2008 he became a Member of the Colorectal Clinical Studies Group of the National Cancer Research Institute (NCRI) and in October 2013 was appointed Visiting Professor at Glyndwr University.