In the United Kingdom Professor Newall was responsible for audiological services for a large area of the North of England. He was a member of the U.K. Department of Health Advisory Committees on Audiological Equipment and on Services for Hearing Impaired Persons. He won a TWJ Traveling Fellowship and visited Scandinavia to study aural rehabilitation in adults and was one of the first to appoint Hearing Therapists in the U.K. He was the founding secretary of the British Association of Audiological Scientists and a council member of the British Society of Audiology.

Since arriving in Australia in 1980, Professor Newall was responsible for establishing the only postgraduate training program for audiologists in New South Wales. This program is based in the Linguistics Department of Macquarie University and is one of four nationally and is well recognized for the quality of its graduates. He was responsible for the AUSAID-funded International Developments Project which led to the first training program for audiologists in Beijing. He has been instrumental in setting up Masters in Clinical Audiology program at the University of Santo Tomas and at the University of the Philippines in Manila where he is a visiting professor. He has successfully applied for three Australian Youth Ambassadors for Development (in Beijing, Fiji and Manila). He has also been a visiting professor and an external examiner for the National University of Malaysia audiology program in Kuala Lumpur and at the University of Santo Tomas in Manila. This work was recognized by the Audiological Society of Australia who presented him with the Certificate of Outstanding Service and has made him one of the few Fellows of the Audiological Society of Australia.

Philip Newall has research interests in clinical audiology, especially in the area of amplification for the severely and profoundly hearing-impaired and in the epidemiology of deafness and tinnitus. He has over 100 publications and has been a chief investigator on over A$3 million worth of research grants including 5 from the National Health & Medical Research Council and is a named researcher in the $34.5million Co-operative Research Centre for hearing aids and cochlear implants. He has made over 130 presentations at conferences in Australia and overseas. He has been an invited international guest speaker at a number of conferences overseas, most recently the Conference of the New Zealand Society of Audiology in Auckland in 2003 and the Asia-Pacific Congress on Deafness in Bangkok in 2009.

He has held a number of posts on the Federal Executive of the Audiological Society of Australia, has been a member of the Research Committees of the National Acoustic Laboratories, and Self Help for Hard of Hearing.  He is a Fellow of the American Academy of Audiology, an editorial consultant for the Australian Journal of Audiology and the Malaysian Journal of Public Health, an assistant editor for the Journal of the American Academy of Audiology, an expert committee member for the Chinese Scientific Journal of Hearing and Speech Rehabilitation and an Honorary Audiologist at Westmead Hospital.

He has worked in the Philippines, Fiji and Samoa on aid projects fitting donated hearing aid to deaf children and continues to be actively involved in this work. He is a Board Member of the Carabez Alliance which is committed to improving services for hearing-impaired children in the Pacific Islands. He was appointed as a Senior Consultant to CRRCDC in 2009 and is very supportive of this very prestigious organization, which is doing so much to improve the situation of hearing-impaired children in China.