Truls Gjestland has worked as a research scientist at SINTEF for 50 years and is now semi-retired. He is a fellow of the Acoustical Society of America and honorary member of the Acoustical Society of Norway and East-European Acoustics Association, and Distinguished International Member of INCE-USA.. During his time at SINTEF, he was mainly involved in environmental noise projects, including several European Union funded projects. He also developed a Noise Management Master Plan for the United Arab Emirates, and advised on theatre design in Switzerland. He has worked on a broad range of noise issuesm including offshore oil platforms, navy vessels, and smaller fishing boats. He has served as an advisor to European and US aviation authorities, the World Health Organization, and ICAO. On the administration side, he has been the secretary of the Federation of Acoustical Societies of Europe (FASE), the vice-president of the European Acoustics Association (EAA), the two-time president of the Acoustical Society of Norway, and the technical chair of ICA 1995 (International Congress on Acoustics). He has been a member of the International Commission on Biological Effects of Noise (ICBEN) since 1983, and chair of the ICBEN teams for 'Community noise' and 'Noise policies and economics'.