| 3rd Industrial Problem Solving Workshop,: University of Victoria, Canada, 31st May - 4th June 1999. |
| 15th Annual Workshop on Mathematical Problems in Industry: Delaware, USA, 7th - 11th June 1999. |
| 35th European Study Group with Industry: Odense, Denmark, 23rd - 27th August 1999. |
| 36th European Study Group with Industry: Eindhoven, Netherlands, 15th - 19th November, 1999. |
| 37th European Study Group with Industry (ESGI 2000): Sheffield, UK, 10th - 14th April, 2000. |