Lee Schruben (left) and Jack P. C. Kleijnen

Professor Jack. P.C. Kleijnen of Tilburg University, the Netherlands, was presented with the Informs Simulation Society's highest honor, the Lifetime Professional Achievement Award at this year's Winter Simulation Conference, December 4th through 7th in Orlando Florida. Unrelated to this award, there was a special research track in tribute to Professor Kleijnen at the Conference, where he was further recognized by being a speaker at the Titan's of Simulation honorary assembly.

Professor Kleijnen has excelled in many of the criteria that are qualifications for this award and made significant contributions to the field of simulation and in other areas for more than 40 years. His published work includes 6 books and almost 200 papers, many receiving awards. Jack was described in one of the nomination's supporting letters as "a true pioneer in simulation research". Another endorsement letter said: "keeping track of Jack Kleijnen's research is close to a fulltime job."

Professor Kleijnen has also distinguished himself in his service to the profession. Jack is the only person in recent memory to have received an Operations Research Meritorious Service Award two years in a row for his editorial and refereeing work - in two different areas!

All the writers of supporting letters mentioned Professor Kleijnen's direct and personal influence on their careers. One of Jack's most notable traits is his consistent energy and infectious enthusiasm for simulation. As noted in one letter, Jack has a "downright charming and genuine fascination with new ideas." All who know Jack will agree with the remark in another supporting letter that points to Jack's constant level of enthusiasm and prolific work both within simulation and in other areas, calling him simulation's "great ambassador".

Lifetime Professional Achievement Award Winners