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NIGP's talented instructors are a source of inspiration and motivation. These amazing instructors put their heart and soul into teaching and encourage students to never stop learning because anything is possible.




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1409 Lewie Road
Columbia, SC 29201-1708
Photo of Ms. Mary L. Sims, NIGP-CPP, CPPO

Ms. Mary L. Sims, NIGP-CPP, CPPO

On the Faculty of:
Alternative Dispute Resolution
Developing and Managing Requests for Proposals in the Public Sector
Fundamentals of Leadership and Management in Public Procurement
Introduction to Public Procurement
Planning, Scheduling and Requirements Analysis

Supervisor of Procurement
Harford County Public Schools
102 S. Hickory Ave.
Purchasing Department
Bel Air, MD 21014
Photo of Ms. Bobbie Tolston, NIGP-CPP, CPPO, CPPB

Ms. Bobbie Tolston, NIGP-CPP, CPPO, CPPB

Bobbie Tolston, NIGP-CPP, CPPO, CPPB Bobbie has over 20 years of management experience in public procurement. She is currently an NIGP Governance Board member for the Talent Council and a Liaison to the Mentorship Committee. Bobbie is currently the Supervisor of Procurement for Harford County Public Schools where she manages the activities of the procurement department and distribution center. Her current position allows for the warehousing and procurement of a variety of products and services, professional and construction related services for 54 schools and multiple offices. Bobbie has a broad range of professional procurement experience. She has managerial experience with implementing change by using technology and best practices. She has been a change agent for agencies such as, water utilities, local, and municipal government agencies. As a lifelong learner, she utilizes her knowledge to encourage procurement professionals to expand their knowledge through education. She is a Pathways Instructor for NIGP, where she has contributed her expertise as a subject matter expert for content development for courses including Foundations of Sourcing and Contracting, Evaluation Methods, Negotiations, Specification Development and Sourcing and Contracting Methods. She is one of the Founding Members of the Radio NIGP show since its inception in March 2021. Bobbie introduced the show with the “Word of the Day” segment. She launched a new segment on the show titled "Deeper Dive—make a splash” in July 2022.
3510 Vintage Trl
Woodstock, GA 30189-8147
Phone: 770-686-1371
Fax: 770-528-8428
Photo of Mr. William J. Tommie, Jr., CPPO

Mr. William J. Tommie, Jr., CPPO

Professional Certification(s) obtained: CPPO

Work Experience – 1981-1989 – Manager of Purchasing, Greenwood School District 50, South Carolina 1989 – 2008 – Coordinator of Purchasing, School District 5 of Lexington and Richland Counties, South Carolina 2008-2012 – Director of Construction Procurement, School District of Pickens County, Pickens, South Carolina 2012 – Present – Director of Purchasing, Cobb County Government, Georgia.

On the Faculty of:
Fundamentals of Leadership and Management in Public Procurement
Sourcing in the Public Sector

Photo of Mrs. Rashpal U.

Mrs. Rashpal U.

1489 Scenic Valley Drive
Loveland, CO 80537
Photo of Mrs. Rhonda S. Ulmer, NIGP-CPP, CPPO, C.P.M.

Mrs. Rhonda S. Ulmer, NIGP-CPP, CPPO, C.P.M.

Rhonda Ulmer is currently the Procurement Manager for the City of Casselberry. She has over thirty years’ experience working in both private and public sector procurement. She began her purchasing career in 1973 managing contracts for the Trident Missile Program for General Dynamics Corporation. Her passion for procurement grew as she entered the public sector and gained experience from city, county, school board and higher education. She earned her B.A. Degree from the University of Central Florida and aspired to growth professionally with certifications. Currently a lifetime Certified Purchasing Manager and a Certified Public Procurement Officer (1994). Certified Negotiator (2012). She received the FAPPO Distinguished Service Award in 2008; Served as President of the Florida Association of Public Purchasing Officers (2000); and was President of the Central Florida Chapter of NIGP. Rhonda continues to support a number of professional organizations, through speaking and working on various committees. She has served on the Governor’s Task Force to assist in rewriting the Auditor selection procedures; NIGP Research Committee and instrumental in the vision for creation of a set of comprehensive principles, standards and procedures, (NIGP’s Values and Guiding Principles); as well as serving on the UPPCC Board of Examiners. Rhonda's hobbies include boating, biking, skiing and traveling.
Contracting Officer
Loudoun County
1 Harrison St SE
Leesburg, VA 20175-3102
Phone: 571-258-3144
Fax: 540-665-0537
Photo of Ms. Kristy D Varda, NIGP-CPP, CPPO, CPPB

Ms. Kristy D Varda, NIGP-CPP, CPPO, CPPB

Originally from Oklahoma and a proud Oklahoma State University Alum, Kristy spent 10 years as a military spouse before relocating to Virginia from Germany. Kristy completed her Masters in Biotechnology Studies in 2008 and her MBA in 2009 while working in a variety of industries. She began her official procurement career working as a Contract Specialist II for Fairfax County, specializing in procurement for Public Safety, IT and Libraries. In September of 2015, she became the Purchasing Supervisor for Frederick County Public Schools in Winchester, Virginia. Now she is a Capital Contracting Officer for Loudoun County Government. Her passion to help others grow in their procurement profession began with presenting webinars on Sole Sources and Software Procurement. She was part of the NIPG taskforce to write the Best Practices series on technology procurement. Most recently she worked on the team to develop the Pathways specialization course “Foundations of Technology Procurement”. She continues to work to build courses to enhance the learning opportunities for NIGP members as well as teaching both the Legal Aspects and Technology courses.
34 Price Lane
Palm Coast, FL 32164
Photo of Ms. Theresa Webb, NIGP-CPP, CPPO, CPPB, C.P.M., M.A.

Ms. Theresa Webb, NIGP-CPP, CPPO, CPPB, C.P.M., M.A.

Theresa Webb, M.A., NIGP-CPM, CPPO, CPPB, C.P.M. has over 30 years of experience in procurement in both the private and public sectors with about 18 years in public sector procurement. In her leadership roles prior to retirement from public procurement, Theresa oversaw the procurement of goods, services, technology, construction, capital improvement and PCard Administration. She has a Bachelors' in Business Administration and a Masters' degree in Business Management. Theresa is a certified NIGP Instructor, and a current Chair of the NIGP Accreditation Committee. Theresa is a member of NIGP, FAPPO, and North Florida Chapter of NIGP, and has been a member of multiple boards, committees, panels, task forces and councils for those organizations over the years. She was recognized by NIGP in 2013 as National Buyer of the Year.
Director, Contracts and Procurement
San Mateo County Transit District
1250 San Carlos Ave
San Carlos, CA 94070-2468
Photo of Mr. Kevin C. Yin, NIGP-CPP, CPPB

Mr. Kevin C. Yin, NIGP-CPP, CPPB

Kevin has been in procurement for 20+ years, in both private and public sectors. Currently, he is the Director of Contracts and Procurement for the San Mateo County Transit District in San Carlos, California. He and his team are responsible for developing and administering the District's procurement policies and procedures, and all procurement activities.

Kevin's thoughts on learning... 1) You're never too old to learn. 2) It's forever. No one can ever take that knowledge away from you. 3) Learning should be fun (your brain may experience a bit of pain, but it's temporary). Kevin is an active member at the Northern California Chapter of NIGP, where he is serving as the Chapter Vice President; and at the National level, where he is a Certified NIGP Instructor. Kevin has served on committees and on the Board of the OPPA Chapter of NIGP (Oregon), including serving as the OPPA President during FY2008-2009. Also, he has served as the Vice Chair of the NIGP Member Council.

Kevin graduated from the University of Oregon (Eugene, Oregon) in 1993 with BAs in Finance, Marketing, and Psychology. GO DUCKS!

Kevin lives in the Bay Area in California. He is married to Kelly for over 25 years. They have two children, Ethan (20) and Abbie (18).

On the Faculty of:
CPPB Prep /
Developing and Managing RFPs in the Public Sector /
Introduction to Public Procurement

University of Alberta - Procurement and Contract Management
2 Eden Court
St. Albert, AB
T8N 6L1
Photo of Mrs. Donna Zeeh Chorley

Mrs. Donna Zeeh Chorley

Donna Zeeh Chorley has worked within Public Procurement since 1981 in a variety of capacities from administration to management. She has been fortunate in her career to have worked with and bought a diverse selection of commodities and services, including construction. Donna currently is a Procurement Specialist for Procurement and Contract Management within the University of Alberta in Edmonton, Alberta, Canada. She has both her CPPO and CPPB Certifications and has been teaching with NIGP since 1997. Donna is a Master Instructor for NIGP and has served on the Executive and various Committees within NIGP’s Canada West Chapter since 1989 including Vice-President (2009 & 2010), President (2011 to 2014), and Past President (2015). Her focus in teaching is to make the valuable learning experience open, educational, memorable and fun.

On the Faculty of:
Ethics: A Survival Kit for Public Procurement
Planning, Scheduling and Requirements Analysis

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