Justin is a Consultant and Professional Lead for Speech and Language Therapy (SLT) at the Royal Marsden NHS Foundation Trust (RM) in London. He is also a senior member of the Applied Health Research Group and leads the survivorship theme for the International Centre for Recurrent head and Neck Cancer (IReC) at RM. From 2016-2026, he established and led a dedicated SLT service at Imperial College Healthcare NHS Trust supporting the National Centre for Airway Reconstruction and complex laryngology service. He is a Professor of Practice in Speech and Swallowing Rehabilitation in the Department of Surgery and Cancer at Imperial College London.

Justin has been an investigator on several research studies, including NIHR portfolio studies. He is chief investigator on the NIHR-funded CONSIDER Study. He has published extensively and contributed to key policy and position papers, acting as an expert adviser to several national organisations. He was the Allied Health Professions Council Member for the British Association of Head and Neck Oncologists and is currently SLT Council Member for the British Laryngological Association. He is President of the UK Swallowing Research Group. Justin was awarded the Fellowship of the Royal College of Speech and Language Therapists in 2018 and an MBE in the 2022 Queen's New Year's Honours in recognition of his contribution to the SLT profession.

Prof. Dr. Engin Dursun was born in 1968 in Erzurum, Türkiye. He graduated from Istanbul University, Istanbul Faculty of Medicine in 1991. After completing his residency training in Otorhinolaryngology at the Ankara Training and Research Hospital, Ministry of Health, in 1995, he worked as a Specialist Physician at the same institution until 2000.

Between 2000 and 2001, Dr. Dursun worked as a Senior Specialist Physician at the 3rd Department of Otorhinolaryngology of the Ankara Numune Training and Research Hospital, Ministry of Health. Between 2001 and 2003, he served as Deputy Chief of Clinic in the Department of Otorhinolaryngology at the Ankara Oncology Training and Research Hospital; and between 2003 and 2011, he continued in the same position at the 3rd Department of Otorhinolaryngology of the Ankara Numune Training and Research Hospital. Between 2011 and 2012, he worked as an Instructor Physician in the same department.

Between 2002 and 2003, he completed a Clinical Fellowship in the Department of Otolaryngology–Head and Neck Surgery at the University of Arkansas for Medical Sciences (UAMS) in Little Rock, Arkansas, USA.

He was appointed Associate Professor in 2005 and promoted to Professor in 2012.

In 2012, he joined the Faculty of Medicine at Recep Tayyip Erdoğan University. Between 2012 and 2021, he served as Head of the Department and as Educational and Administrative Director of the Department of Otorhinolaryngology at the Training and Research Hospital. He also served as Head of the Department of Surgical Medical Sciences, Chairman of the Committee for Specialty Medical Education and Coordination, and as a Founding Board Member of the Undergraduate Medical Education Simulation Center.

In 2021, he was appointed as a faculty member in the Department of Otorhinolaryngology–Head and Neck Surgery, Faculty of Medicine, Lokman Hekim University. He is currently serving at the same institution and continues his duties as Director of the ViTAL (Virtual Training and Learning for Healthcare) Simulation Center; Board Member of the Center for the Treatment, Application, and Research of Cleft Lip and Palate and Related Anomalies (DUDAMER); Advisory Faculty Member of the Center for Innovation in Healthcare and Simulation-Based Education (SİNERG); and Member of the Advisory Board of the Lokman Hekim Health Science Journal. Between 2021 and 2025, he also served as Head of the Department, Clinical Sciences Coordinator for Undergraduate Medical Education, and Year 5 Coordinator.

He has taken active roles in numerous professional societies in Türkiye and currently serves as a Member of the Executive Board and Chair of the Schools Committee of the Turkish Society of Otolaryngology–Head and Neck Surgery. He is also the President of the Otolaryngology–Head and Neck Surgery Association (Ankara) and a member of the General Council of the Turkish Board of Certification in Otolaryngology–Head and Neck Surgery.

His special areas of interest include endoscopic surgery (endoscopic sinus surgery and endoscopic ear surgery), nasal polyposis, head and neck cancers, and medical education with a focus on simulation-based training.