Dr Eustace is a graduate of NUI Maynooth where he studied Biology and Chemistry. He then undertook a MSc in Biological Sciences in Dublin City University. Upon graduation Dr Eustace worked for a campus biotechnology company Archport Ltd, as a Downstream Process Technician/Manager.
in 2006 Dr Eustace returned to DCU to undertake his PhD in the field of Translational Oncology, graduating in 2010. He then undertook several post-doctoral positions both in DCU and the Royal College of Surgeons in Ireland, working as part of the MTCI (SFI) and BreastPredict (Irish Cancer Society) funded research centres.
In 2017 Dr Eustace returned to DCU as the research lead of Molecular Therapeutics for Cancer in ireland and more recently as Assistant Professor in the School of Biotechnology.