After postdoctoral work at Yale University (1989-91) and Ecole Normale Supérieure (1991-1995), he became a lecturer in instrumentation at the CNAM, Paris, a post he has held for most of the time since.
From 2004 to 2007, he was a visiting scientist at University of Oxford where he worked with Prof. Joshua Silver first on laser spectroscopy of highly charged ions, then on vision self-correction using adjustable spectacles.
His research activities are diverse, while his primary interest is in atomic physics. Since re-joining the CNAM full-time in 2007, Dr. Plimmer has been a visiting scientist in several laboratories, notably the National Physical Laboratory, UK, and NIM and TIPC-CAS, China.
He is the author of 42 articles in international peer-reviewed journals, and has produced over 100 communications in total, including conference proceedings, posters and seminars (in both French and English).