The phrase "pivotal role" refers to someone or something that plays a very important and central part in a particular situation or event. Full definition
Two key factors that play pivotal roles in determining just how healthy we are, are diet and exercise. (fitnessandpower.com)
In addition to providing veterinary care, specialists in laboratory animal medicine play pivotal roles in other aspects of an institution's animal care and use program. (aslap.org)
PROFESSIONAL SUMMARY Highly motivated, career oriented management professional with diverse and successful experiences maintaining fast - paced and pivotal roles within dynamic environments. (members.climber.com)