Good Boss Bad Boss Lesson from Effective and Not So Effective Managers with Dr. Doreen McGunagle on The Core Business Show with Tim Jacquet. Dr. McGunagle is an organizational consult-ant, facilitator, and speaker with more then 20 years experience working with Fortune 1000 companies. Dr. McGunagle mentors, advises, and coaches leaders on key strategy issues to improve their market performance and gross profits.Good Boss Bad Boss Lesson from Effective Managers