Arthur is currently working as a Senior Lecturer and Chairman of the Department of Paediatric Dentistry and Orthodontics, University of Nairobi, Kenya. He also serves as a Senior  Paediatric Dentistry Consultant and the Chairman of MiSeDhealth Foundation and Kenya Association of Paediatric Dentists. As a clinical practitioner, researcher and a proponent of preventive oral health care for all children in the greater East African region, Arthur has implemented programmes geared to increasing access to oral health care by all children, and especially the vulnerable children and children with special health care needs living in the rural areas. These programmes have included research in dental caries, talks to general medical colleagues on issues related to common risk approach to the prevention of oral diseases, training of Community Oral Health Officers in the delivery of oral health education and the use of atraumatic restorative treatment approach in the prevention and management of dental caries. In all cases, the emphasis has been on early detection of oral diseases, risk assessment and early intervention, oral health literacy and encouragement of the communities in the utilization of the limited oral health services available to the children. A Kenyan by descent, Arthur received his BDS from the University of Nairobi, and worked for the Governments of Kenya and Zimbabwe, before venturing into general private practice in Nairobi and later joining the University of Nairobi. He holds DGDP RCS (Eng) diploma from the Royal College of Surgeons of England, MSc (Paediatric dentistry) and PhD (Paediatric dentistry) from the University of Amsterdam, The Netherlands, and numerous Course Certificates in  Paediatric dentistry. He is also a Biographee of Marquis Who's Who in the World, and has authored 2 books on Paediatric Dentistry, over 21 articles in peer-reviewed international journals, contributed Chapters to Textbooks of Paediatric Dentistry and given numerous presentations at local and international conferences. He is also an External Examiner at Moi University, Kenya. He believes that success can only be realized through proper planning and hard work.