2015 - date - active Investigator of multiple endovascular neurosurgery clinical trials including: EMMA, ENDOLO, CURES, TATAM, TOBAS, SWAN, EVOLVE, STAT, FIAT, ESCAPE. 

2013 - date - Hospital length-of-stay after endovascular treatment of unruptured intracranial aneurysms: a retrospective study. Co-Investigator.

2013 - date - Does endovascular coiling of posterior communication artery aneurysms result in increased frequency of occipital lobe strokes? Co-Investigator.

2010 - date - CAIN-1: natural history study of Carotid atherosclerosis followed by 3T MR. CHIR Grant funded nation-wide study. Principal Investigator.

2011 - date - Time-Resolved Angiography in Cerebrovascular Shunts (TRACS) - The role of 4D-CTA in the assessment of non-invasive diagnostics of intracranial arteriovenous shunting lesions, The Netherlands. Principal Investigator in Ottawa.

2013 - date - Multi-Detector CT Angiography for Detection and Quantification of Orbital Arteries in Comparison with Digital Subtraction of Angiography: A Retrospective Review. Co-Investigator.

2011 - date - Evaluation of Volume Subtraction CTA in the Follow up of Post Clipped Cerebral Aneurysms. CHAR Grant funded. Co-Investigator.

2009 - date - Long-Term Angiographic Recurrences and Complications after Selective Endovascular Treatment of Aneurysms with Coils. Principal Investigator.

2009 - date - Clinical and Angiographic Outcomes of Stent-assisted Coiling of Intracranial Aneurysms. Principal Investigator.

2009 - 2013 - PRET I and II - Patients Prone to Recurrence after Endovascular Treatment, Industry-funded International RCT. Principal Investigator in Ottawa.

2009 - date - Factors Determining Periprocedural and Long-term Complications of Carotid Artery Stenting in High Risk Patients. Principal Investigator.

2008 - date - Stenting for refractory idiopathic intracranial hypertension associated with venous sinus stenosis. Co-investigator.

2008 - 2013 - Endovascular coiling of posterior communicating artery aneurysms: is preservation of the PCOM necessary? Co-investigator.

2008 - 2012 - PREDICT (Predicting hematoma growth and outcome in intracerebral hemorrhage using contrast bolus CT Study).  International study. Co-investigator.

2007-2012 - IMS-III – International Management of Stroke Trial, phase III, randomized, multi-center, open label. Co-investigator.

2007 - 2011 - Understanding Wait Lists for MRI: Triaging of Priority. Co-investigator.

2007 - 2009 - Carotid Revascularization Endarterectomy vs. Stenting Trial (CREST), Industry-funded International Multi-Center RCT. Co-investigator.