Upon graduation, Lynn joined the
National Centre for Social Research as a survey researcher. In 1994 he was promoted to research director and was, for several years, director of the Scottish School Leavers Survey series, carried out for the Scottish Government. In 1998, he became director of the Survey Methods Centre, a position held for three years before moving to the
University of Essex as Professor of Survey Methodology. In 2020, Lynn became director of the Institute for Social and Economic Research. and since 2023 he has been Director of Survey Futures, a sector-wide collaboration to secure the future of social survey data collection in the UK. In 2004, with
Willem Saris, Lynn co-founded the European Survey Research Association and also founded its journal,
Survey Research Methods, of which he became the first Editor-in-Chief. He has been involved since its inception in the
European Social Survey, having served (1997-1999) on the
European Science Foundation methodology committee to develop a blueprint for the survey. Lynn was subsequently a member of the sampling expert panel, the methodology committee and, since 2017, a member of the Core Scientific Team as Chair of the sampling and weighting expert panel. He has served on various committees, including the National Statistics Methodology Advisory Committee, the Department for Business, Innovation and Skills Expert Review Group on Evaluation, the Ministry of Justice Court Reform Advisory Panel, and the
Economic and Social Research Council (ESRC) Expert Advisory Group for Data Infrastructure, Skills and Methods. He is currently an advisor to the
United Nations Statistics Division on household survey methods. He served as Editor of the
Journal of the Royal Statistical Society Series A (Statistics in Society) from 2002 to 2005 and as associate editor of the
Statistics Canada journal
Survey Methodology from 2010 to 2015. In 2017, he was elected president of the
International Association of Survey Statisticians, having earlier served two-year terms as vice-president and president-elect.{{cite web|title=Professor Peter Lynn: President-Elect of the International Association of Survey Statisticians ==Work==