• Maxillofacial Surgery
• Scalpel-free facial reconstruction
• Treatment of tumors and deformities of the facial bones
• Endoscopic and minimally invasive salivary gland surgeries
• Application of PSI technology (customized implants)

• 1997-2000: Candidate of Medical Sciences, Hebrew University, Jerusalem
• 2001-2004: Doctor of Medical Sciences, Hebrew University, License No. 10145.
• 2001-2006: Doctor of Philosophy, Hebrew University, Laboratory of Dental Research.

Postgraduate education and courses:

• 2009-2011: Postdoctoral studies, Cancer Research Center, Technion, Haifa
• 2013: Facial Aesthetic Surgery Course, University of Manchester, England
• 2014: Fellowship in PSI (Patient Specific Implant) technology, Hannover, Germany

• 2007-2012: Resident in Oral and Maxillofacial Surgery, Rambam Medical Center, Haifa
• 2012-2015: Attending Physician, Department of Oral and Maxillofacial Surgery, Rambam Medical Center, Haifa.
• Private Medical Practice

• 2011-present: Clinical Instructor, Faculty of Medicine, Technion, Israel
• Teaches head and neck surgery courses for medical students:

1. 2010-2015: “Oral and Maxillofacial Surgery Techniques in Oncology and Trauma”, Technion, Israel Institute of Technology, Faculty of Medicine and Faculty of Social Welfare and Health, Cheryl Spencer Chair of Nursing, for undergraduate students.
2. 2010-2015: “Oral and Maxillofacial Surgery and ENT Cycle”, for students of the Technion Faculty of Medicine, undergraduate.
3. For 5th-6th year students, “Role of research in the surgical department”, “Salivary gland tumors”, “Physical examination in Oral and Maxillofacial Surgery”, “Head and Neck Oncology”.
4. 2011-2015: Course “Profession of a doctor” for undergraduate students, introduction to the medical profession.

• 2009-2010: Research on the role of heparanase in oral cancer, grant from the Israeli Association for Cancer Research
• 2014-present: Member of the Editorial Board, World Journal of Stomatology.
• Regular publications in Journal of Oral and Maxillofacial Pathology
• Active participation in international symposia and conferences

Main areas of research:

• Molecular Biology and Dentistry: Leyser focuses on the study of proteins such as tuftelin and amelogen and their role in tissue mineralization, regeneration and cell differentiation.
• Oncology: He conducts research on oral cancer, studying molecular markers such as heparanase to predict and develop new therapies.
• Oral and Maxillofacial Surgery: Leyser is involved in clinical research related to surgical treatments for diseases of the oral and maxillofacial region, including cancer, benign tumors and trauma.

International:

• Member and Israeli representative in the European Association of Oral and Maxillofacial Surgery (EACMFS).
• Member of the International Association of Oral Oncology (IAOO).
• Member of the International Association of Oral and Maxillofacial Surgeons (IAOMS).

National:

• Member of the Israeli Society for Head and Neck Surgery and Oncology.
• Member of the Israeli Dental Association (IDA).
• Member of the Israeli Medical Association (IMA).