Mark edited an academic journal article for me on German family firm governance. He was an incredible collaborator, not just doing the copy-editing you would get from a regular editor but truly engaging with the content of my work. He made many invaluable suggestions for improving the flow of the argument and I am extremely grateful for the time he took to help this project to success.
Mark has served as editor for two special issues of peer-reviewed journals that I edited with a colleague. He not only translated German texts excellently and edited English texts by non-native authors highly professionally, but has also shown an excellent sense for the respective profiles of the journals (historical / interdisciplinary) and thus gave us all important suggestions on structure and argumentation. Many thanks for that!