The Executive Team
Working Together
We are organizational psychologists, software engineers, designers and service professionals working together. We are:
- Scientist-practitioners with a consistent history of developing, validating and refining assessment methods and tools for practical use in organizations
- Software developers who have provided computerized tools since 1985 and web-enabled tools since 1998
- Service professionals dedicated to assisting our clients to succeed in their businesses
Organizational Psychologists
Our leaders are organizational psychologists. They and all our organizational psychologists are members of the American Psychological Association and are licensed by the State of Texas. We subscribe to the professional practice codes of the American Psychological Association, the Society for Industrial Organizational Psychologists, the Texas State Board of Psychologists and the US Federal Uniform Guidelines on Employee Selection Procedures.
David G. Bigby, Ph.D.
President
David G. Bigby is President, founder and principal of Assess Systems (formerly Bigby, Havis & Associates). Dave has over 30 years of experience in the areas of test development and validation; psychological appraisal; organizational analysis and development; executive coaching and development; and computer applications. He has spent his entire career working as a practitioner consultant, specializing in developing and using technology to provide sophisticated competency-based assessment services to Assess Systems’ clients. He is heavily involved in and oversees the adaptation of Assess Systems’ assessment tools in over forty-two countries to date. Dave received his doctorate in Industrial/Organizational Psychology from the University of Houston. He is a licensed Psychologist in the State of Texas.
JoAnn McMillan, Ph.D.
Chief Operating Officer
JoAnn McMillan is Chief Operating Officer of Assess Systems and is responsible for coordinating the consulting, IT, marketing and customer support teams for Assess Systems. In addition, she serves as partner liaison for Assess Systems’ strategic alliances and distributor relationships. With over 25 years of consulting experience, she has been an integral part of Assess Systems’ development and implementation of selection and development-oriented assessment solutions for clients worldwide. As a licensed Psychologist in the State of Texas, JoAnn has expertise in the areas of competency modeling, test validation, selection process design, leadership assessment and executive coaching. She received her Ph.D. in Psychology from Texas Tech University in 1987 and her BA in Psychology from the same university. She is a licensed Psychologist in the State of Texas.
Sarah Glass, M.A.
Vice President, Consulting Services
Sarah Glass is Vice President, Consulting Services for Assess Systems. Sarah has been providing consulting services to companies in the areas of developing competency models and selection procedures, validating selection assessments, designing development programs and providing one-on-one and workshop-based developmental programs. She has been involved in the development and marketing of both the Assess Expert System and the Assess Strategic Success Modeling Process. She is currently part of the Assess Systems team that is adapting assessment tools for use in the international marketplace. She earned her MA in Clinical/Counseling Psychology from Southern Methodist University in 1995 and her BA in Psychology from the same university. She is a licensed Psychological Associate in the State of Texas.
Carol A. Jenkins, Ph.D.
Vice President, Consulting Services
Carol A. Jenkins is Vice President, Consulting Services for Assess Systems and her areas of specialization include test development and validation, selection process design, leadership assessment, development and coaching. She has been involved in the development and marketing of both the Assess Expert System and the Assess Strategic Success Modeling Process. She is currently part of the Assess Systems team that is adapting assessment tools for use in the international marketplace. As the Latin America market coordinator, Carol is directly involved in projects in Mexico and Columbia. She received her MA in Industrial/Organizational Psychology from the University of Southern Mississippi in 1995 and her Doctor of Philosophy in I/O Psychology from the same university in 2001. She earned her BA in Psychology in 1993 at Northeast Louisiana University. She is a licensed Psychologist in the State of Texas.
Steve Hardesty, Ph.D.
Director, Consulting Services
Steve Hardesty is Director of Consulting Services for Assess Systems and leads our executive assessment and coaching practice area. In his consulting work, Steve had been using Assess Systems tools for building selection and development processes and for creating culture change in large corporations. Prior to joining Assess Systems, he managed coaching and assessment services at a Fortune 100 high tech company and, prior to that, he was a Senior Consultant for a major human resource development company. He has designed and delivered projects across North America, Europe, China, and Japan. His first career in psychology was as a clinician working with adults, children, and families. He also managed a child guidance clinic and was an outpatient clinic director for a major psychiatric hospital. He earned a BA in Psychology from Southern Methodist University and his Ph.D. in Clinical Psychology from the University of Texas Southwestern Medical Center. He is a licensed Psychologist in the State of Texas, and is a member of the American Psychological Association and the Society for Industrial and Organizational Psychology.
Diane Ianni, B.S.
Director, Marketing and Sales
Diane Ianni is Director of Marketing and Sales for Assess Systems and is responsible for global marketing, sales and strategic partner alliances. With over 20 years in the software and services industry, she has experience in alliance relations, marketing, product management, sales and technical support. Prior to joining Assess Systems, she was Senior Director of Marketing and Sales at i2 Technologies, a supply chain management company. She has marketing and leadership experience with start-ups to enterprise companies including CA, Goal Systems, Legent Corporation, Platinum technology and Rockwell International. She received her BS in Mathematics and Computer Science from Bethany College.
David Sheu, M.B.A.
Director, Technology
David Sheu is Director of Software Development for Assess Systems and is responsible for the Information Technology operations of the company, which includes system architecture and development of web applications. He joined Assess Systems in 1998 and was involved in the design and development of the first web enabled Assess Systems suite of tools. David ensures the company’s software solutions include cutting edge technology and user friendliness as top priorities. He has experience in the development and support of desktop applications and web applications utilizing various types of technology, project management, and web application integration interfaces. He holds a BS in Computer Science and a Masters in Business Administration from the University of Texas at Dallas.