Besides his involvement in all aspects of Interventional Neuroradiology/NeuroEndovascular Surgery, he has a particular and longstanding interest in acute stroke treatment, and was deeply involved in the development, trials, and FDA/CMS approval processes for the first cleared stroke device (MERCI device). He also has a deep focus on Aneurysm therapy, and was one of the physicians involved in the first human case of aneurysm detachable coiling. He was prior President of the Society of NeuroInterventional Surgery, prior Board member of the World Federation of Interventional & Therapeutic Neuroradiology, and a Fellow of the American Heart Association and Society of NeuroInterventional Surgery. He holds certifications by the American Board of Radiology in both Diagnostic Radiology and Neuroradiology and by the American Board of Neurological Surgery in CNS-Endovascular Surgery.