Dr. Weigand's work experience has been varied. He spent 11 years living in England. During this time he was a reader in sport and exercise science, the chair of the sport and exercise department and the director of the Sport and Exercise Research Center at the University of Northampton. He also taught sport and exercise psychology, as well as directed all sport-related research and consultancy for the university.

While living in England, he was the only American to be chair of the Psychology Section of the British Association of Sport and Exercise Sciences (BASES). In addition, he was the liaison between BASES and the Association for Applied Sport Psychology (AASP), and one of two BASES representatives on the General Assembly of the European Federation of Sport Psychology (FEPSAC).

Dr. Weigand has held a number of accreditations: an AASP Certified Consultant, a BASES Accredited Sport and Exercise Scientist: Psychology (Research and Support), and a British Psychological Society Chartered Psychologist. He is a fellow of AASP (inactive) and was a fellow of the European College of Sport Science. He was also a member of the U.S. Olympic Committee Sport Psychology Registry and a member of the British Olympic Association Psychology Advisory Group.

He has conducted numerous presentations, workshops, interviews, and individual / team consultations on mental skills training in sport and exercise. He has worked with novice and elite athletes in the U.S. and U.K., including national champions, Olympians and professionals from the following sports: athletics (track and field), badminton, baseball, basketball, boxing, football (American), field hockey, golf, ice (figure) skating, lawn bowling, motor racing, platform / springboard diving, rowing, rugby union, soccer, softball, swimming, tennis, triathlon and water polo. He recently worked as a full-time mental performance specialist at the U.S. Army JFK Special Warfare Center and School at Ft. Bragg. He also has his own consulting business, Achieve Acumen. Dr. Weigand is also a consultant with Sport Psych Consulting.

He recently finished as the longest-serving editor-in-chief of the Journal of Applied Sport Psychology. He is the founding editor of the newly-established Mental Toughness Research Journal. Previously, he was the editor-in-chief for the Journal of Social, Behavioral, and Health Sciences; a behavioral/social science section editor for the European Journal of Sport Science; an editorial board member of the Journal of Sports Medicine and Physical Fitness; and an associate editor for Athletic Insight and the Journal of Sport Behavior. He has also reviewed articles for the European Journal of Psychology in Education, the European Physical Education Review, the European Journal of Physical Education, theJournal of Adolescence, the Journal of Sport and Exercise Psychology, The Sport Psychologist, the International Journal of Sport & Exercise Psychology, the Journal of Sports Sciences, the Journal of Sport Management, the Psychology of Sport and Exercise, and the Research Quarterly for Exercise and Sport. He had reviewed more than 1,600 manuscripts.

He is the Director of the Mental Toughness Research Institute and has had many articles published in scientific journals and has presented papers internationally. His research is primarily in the following areas: motivational climate and the development of achievement motivation in physical education, sport and exercise; mental skills training effectiveness in physical education, sport and exercise; and the psychology of injury rehabilitation in sport and exercise.