CAPT Faculty



CAPT faculty members have outstanding skills in a number of fields and are extremely qualified to present engaging and effective training programs.

  • Experience. Each trainer has a minimum of 10 years of experience in using the Myers-Briggs Type Indicator® instrument.
  • Proven expertise. Our faculty members have a broad range of expertise. Many of them teach the MBTI® Certification Training Program, CAPT's four-day foundation course for the development of MBTI practitioners. They have individualized expertise in such areas as team performance, leadership development, communication skills, decision making, change management, career counseling, family counseling, learning and teaching styles, and adult learning.
  • Outstanding evaluations from workshop participants. CAPT has an evaluation system for every training program we offer. Our faculty members consistently receive outstanding marks. Each trainer is sensitive to the individual learning styles of participants and is dedicated to seeing that course objectives are met.
  • Diverse training abilities. CAPT's faculty members deliver programs to organizations, small businesses, and corporations throughout the world. CAPT clients include American Express, American Red Cross, AT&T, Busch Gardens, Cornell University, Duke University, NASA, Cisco Systems, Oracle Corporation, Ronald McDonald House, Seton Hall University, Singapore Institute of Management, Temple University, Tennessee Valley Authority, University of North Carolina, University of Florida, University of Mexico, USAA, USDA, US military and government, and Walt Disney Corporation.


CAPT faculty members include:

ALLEN L. HAMMER, Ph.D., is an author, consultant and researcher. He works with Manfredo Curtis Associates to provide consulting and coaching for organizations on leadership, team development, organizational change and career development. He is also a member of the MBTI® Step III development team.

Dr. Hammer received a bachelor's degree in Administration and Management Science from Carnegie-Mellon University, a Ph.D. in Counseling Psychology from Michigan State University and completed a two-year postdoctoral fellowship in Computer Applications in Mental Health at the Missouri Institute of Psychiatry. He is a winner of two Isabel Briggs Myers Research Awards for his research on couples and for his research on the MBTI Step III instrument and a winner of the APTi Innovation Award. He is a former editor of the Bulletin of Psychological Type and served on the editorial board of the Journal of Psychological Type for two decades.

He worked at Consulting Psychologists Press from 1986 to 1998 where he held a number of positions including director of product development, director of research, and editor in chief.

Dr. Hammer is author or co–author of numerous publications, including the MBTI® Workstyles Report, MBTI® Career Report, MBTI® Team Report, Introduction to Type® and Careers, MBTI® Manual, MBTI® Step II™ Manual, MBTI® Step III Manual, and the MBTI® Complete assessment.


PATRICK L. KERWIN, MBA, NCC, is principal of Kerwin & Associates in San Diego, California, specializing in the development of organizations, teams, and individuals. An MBTI® Master Practitioner, Patrick works with corporate, education, and non-profit organizations to put the MBTI instrument into practice for team building, communication enhancement, change management, stress management, and individual development. He has worked with organizations including Microsoft, Google, Amgen, Heinz, Genentech, the U.S. Navy, the Air Force Space Command, Lockheed Martin, Monarch Healthcare, the California HealthCare Foundation, the University of Notre Dame, Purdue University, and Thunderbird School of Global Management.

In addition, Patrick develops and delivers customized training programs and workshops. He is the developer of the new MBTI® Optimizing Team Performance team-building program, creator of the MBTI® Team Performance Accelerator program for the publisher of the MBTI instrument, CPP, Inc., and author of the customized, MBTI-based Personality Insights training program for Microsoft. He is also the author of the Kerwin Values Survey® career values assessment.

Patrick is founder and past president of SANDAPT, the San Diego chapter of the Association for Psychological Type International. Patrick holds his MBA and Career Counseling Specialist Graduate Certificate from California State University, Long Beach, and is a National Certified Counselor.


LINDA K. KIRBY, PH. D., works in Denver, CO, as an organization consultant, trainer, and writer. Her focuses are using the MBTI® instrument in organizations, multicultural uses of the MBTI tool, and development of MBTI training materials.

Linda's publications include Introduction to Type® , with K. D. Myers; Introduction to Type® Dynamics & Development, with K. D. Myers; The Challenge of Change in Organization, with N. J. Barger; Developing Leaders, with C. Fitzgerald; WORKTypes, with J. M. Kummerow & N. J. Barger; Type & Change: MBTI Leader's Guide & Participant Guide, with N. J. Barger; Uses of Type in Organizations, with N. J. Barger and R. R. Pearman; Type and Culture, with E. Kendall and N. J. Barger; and MBTI® Practitioner's Field Guide, with N. J. Barger.

Linda earned her master's degree and doctorate at the University of Colorado and taught at Case Western Reserve University in Cleveland, OH.


JEAN M. KUMMEROW, Ph.D., is a psychologist/consultant/author/trainer with her own business in Minneapolis, Minnesota. She trains professionals internationally in the use of psychological instruments and specializes in leadership/management development and coaching, team building, and career counseling applications.

She co-authored the MBTI® Step II™ Interpretive Report as well as Step II interpretive materials including the MBTI® Step II™ User's Guide, Understanding Your MBTI® Step II™ Results, and Working with MBTI® Step II™ Results. Her chapter "Uses of Type in Career Counseling" appears in the MBTI® Manual. She is co-author of Introduction to Type® in Organizations, LIFETypes, and WORKTypes. The light-hearted Type Indicator for Pets is also one of her endeavors. She has written several hand-outs for CAPT on type verification, type dynamics, communication and teams. She also blogs at www.capt.org/type-for-life-blog/. She is a reviewer for the Journal of Psychological Type (JPT).

Her doctorate is in Counseling and Student Personnel Psychology from the University of Minnesota. Her BA is from Grinnell College in Iowa. She is a Licensed Psychologist in the State of Minnesota.


GERALD P. MACDAID is an independent trainer and consultant. From 1981 to 1999 Jerry served on staff at the Center for Applications of Psychological Type (CAPT), where he served in various positions including chief executive, director of research, consultant, and trainer. He worked closely with Mary McCaulley on the Manual: A Guide to the Development and Use of the Myers-Briggs Type Indicator® in Higher Education, 2nd ed., running extensive databank analyses and compiling contributed studies. Other major projects at CAPT include the longitudinal Engineering Education Research Consortium, MBTI® Form AV analysis, validation studies for the Spanish and Korean translations of the MBTI® tool, and the University of Florida Freshmen Ten Year Follow-Up Study. He is a contributing author for Uses of the MBTI® Instrument in Colleges and Universities and co–authored The MBTI® Career Report Manual and CAPT's Computer Scoring Career Reports. He is the senior author of the CAPT Atlas of Type Tables, which is a compendium of type data on careers. Jerry is also extensively involved in suicide and crisis intervention for the Alachua County Crisis Center where he has been a trainer, consultant, and crisis counselor since 1979. He has collected data on the relationship between type and training for crisis counselors. Jerry also worked in student development and counseling as a residence hall director and Learning Skills Center director at the University of Florida while pursuing his degree in psychology.


CHARLES R. MARTIN, Ph.D., is a licensed psychologist whose background includes work in personality assessment, the psychology of peak experiences and peak performance, and mind-body health. Charles' work with individuals and organizations focuses on executive coaching, leadership development, career planning, and personal coaching. He has provided services in business, educational, government, healthcare, and military settings, and his clients include Fortune 50 companies. Charles consults and delivers training workshops nationally and internationally, and is the author of Looking at Type®: Your Career and Looking at Type®: The Fundamentals. He is co–author of Out of the Box: Exercises for Mastering the Power of Type to Build Effective Teams, and Building People, Building Programs: A Practitioner's Guide for Introducing the MBTI® to Individuals and Organizations.

He received his doctorate in counseling psychology at the University of Florida and his MA Education and BA degrees at Wake Forest University.


ELIZABETH MURPHY, Ed.D., is a psychologist who has worked with type concepts since the early 1980s. Her research focuses on verifying (with video support) the development of normal personality differences according to the theory of psychological type. She works extensively with families and teams of people to improve communication and resolve relationship needs. She is an internationally recognized educational authority, whose experience includes conducting training throughout the United States as well as Canada, Singapore, Australia, New Zealand, and Malaysia. Her contribution to and leadership in developing the Murphy-Meisgeier Type Indicator for Children® (MMTIC®) assessment reflects her unusual and diverse educational background. She has taught children from preschool to high school age and worked as a licensed school psychologist. She is also the author of The Developing Child. Her dissertation won the Isabel Briggs Myers Research Award, and she received the Gordon Lawrence Award for contributions to type in education. Carlow College honored her with their Alumna Award. Currently, she works as an independent consultant to schools, organizations, and families.


NAOMI L. QUENK, Ph.D., is a licensed clinical psychologist. She is a past president of the Association for Psychological Type International (APTi), and former director of training for the APTi MBTI® Training Program. She is a member of the board of the Myers & Briggs Foundation. She has written numerous research and theoretical articles on psychological type and is author of Beside Ourselves: Our Hidden Personality in Everyday Life, In The Grip: Understanding Type, Stress and the Inferior Function, Essentials of Myers-Briggs Type Indicator® Assessment, and Was That Really Me? How Stress Brings Out Our Hidden Personality. She is co–author of Interpretive Guide for the MBTI® Expanded Analysis Report, Workbook for the MBTI® Expanded Analysis Report, the MBTI® Step II™ Expanded Interpretive Report, MBTI® Step II™ Interpretive Report, and MBTI® Step II™ Profile. She is also co–author of the MBTI® Manual: A Guide to the Development and Use of the Myers-Briggs Type Indicator® , MBTI® Step II™ Manual and MBTI® Step III Manual. She has co–authored two books with her husband, Alex T. Quenk, Dream Thinking: The Logic, Magic, and Meaning of Your Dreams and True Loves: Finding the Soul in Love Relationships. She has been conducting workshops on various aspects of the MBTI instrument nationally and internationally for many years and is actively involved in research, theory, and applications of the instrument.


SONDRA VANSANT, LPC, is a clinical mental health and career counselor who maintained a private practice in Chapel Hill, NC for over 20 years. She served on the faculties of the Principals' Executive Program of the University of North Carolina at Chapel Hill and the MBTI® Qualifying Programs of the Association for Psychological Type International and Psychometrics Canada. She has consulted with corporations large and small and federal and state government agencies providing consultation with individuals and teams, as well as seminars and workshops for organizations in North America and Asia. For some years she served as a career counselor for USA Today's online edition. A former educator, Sondra has also worked with many school leadership teams and faculties to help them work together to understand how students learn differently, and to design curriculum and instruction to accommodate these differences. Her board certification includes clinical mental health, career counseling, and clinical use of hypnosis.

Sondra has retired from counseling individual clients in her practice but continues to write and work with graduate fellows in the Duke-UNC Rotary Center for International Studies in Peace and Conflict Resolution. She is the author of numerous articles and two books, Wired for Conflict: The Role of Personality in Resolving Differences and co-author of Great Minds Don't Think Alike: Success for Students through the Application of Psychological Type in Schools.

She lives in Chapel Hill with her husband Jerry and labradoodle Meg and is fortunate enough to have her adult children living nearby. Her type is ENFJ.