Mike Kirkley, the U.K. managing director of Essilor, has retired after 35 years of service with the group, and he is being replaced by Tim Precious, who has served most recently as vice president of the group for the Nordic countries. Precious is being succeeded in this post by Sebastian De Jong, former managing director of Essilor for the Netherlands, who is in turn being replaced by Gisjbert Maast, the former marketing director for the Netherlands.