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Instructor Profiles PDF Print E-mail

Eric Pimpler, M.A.G., GISP

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Eric is the founder and owner of GeoSpatial Training Services ( and has over 20 years of experience implementing and teaching GIS solutions using ESRI, Google Earth/Maps, Open Source technology.  Currently Eric focuses on ArcGIS scripting with Python, and the development of custom ArcGIS Server web and mobile applications using JavaScript.  Eric is the author of Programming ArcGIS 10.1 with Python Cookbook and Building Web and Mobile ArcGIS Server Applications with JavaScript.

Eric has a Bachelor’s degree in Geography from Texas A&M University and a Master's of Applied Geography degree with a concentration in GIS from Texas State University.


Alissa Bickar, M.A.

 Alissa Bickar

Alissa Bickar has developed various courses as an instructor for GeoSpatial Training Services and has recently been appointed as the ArcGIS Desktop Training Program Manager with GTS.  She is responsible for developing and updating course materials for the program as well as assisting clients with their course and annual subscriptions.

She has extensive experience in the GIS field as a consultant to federal and local governments, environmental engineering firms, and many clients in the Oil and Gas industry.  She also has experiences as college professor and helped to develop GIS and Geography courses for higher education.

Alissa has both a Bachelor's and Master's degree in Geography from California University of Pennsylvania.

John Schaeffer, GISP

John Schaeffer

John Schaeffer is an owner of Juniper GIS Services, and holds the titles of Senior GIS Analyst and Lead Instructor. John has over 25 years of experience in technical education and 16 years of experience using and teaching GIS and is certified as a GISP through the GIS Certification Institute and is an ESRI authorized consultant and instructor. John regularly develops and teaches hands-on GIS classes in ArcGIS, Spatial Analyst, and Geodatabases. He has taught hundreds of classes for all levels of government and many diverse industries throughout the U.S. and abroad. When not teaching or developing classes, John has been the project leader for a wide variety of GIS projects, including wildfire hazard analysis, CAD to GIS data conversion, watershed analysis and census projects for cities, counties, utilities, and businesses.

Before starting Juniper GIS Services in 2000, John was an Assistant Professor of CADD and GIS at Central Oregon Community College. In 1994, he created the AAS degree program in GIS Technology, the first in Oregon. Besides teaching at the community college, John has also been involved in several National Science Foundation grants for training other teachers and developing GIS curriculum aimed at technical and community college GIS programs.

Tripp Corbin, MCP, CFM, GISP


Tripp is an award winning ESRI Authorized Instructor with over 20 years of GIS, Mapping and Surveying experience.  He is the Vice President of GIS/IT services for Keck & Wood, Inc.  Keck & Wood is an ESRI Business Partner that focuses on providing engineering, planning, and GIS services to municipalities throughout the Southeast.  Tripp is familiar with a wide range of GIS related software including ArcGIS Desktop, ArcGIS Server, ArcView GIS, AutoCAD Map 3D and more.  He is a very active member of the GIS Community with memberships in Georgia URISA, FL URISA, URISA International, GITA, SAMSOG and many other professional organizations.  He is also a URISA Authorized Workshop Instructor.  Tripp was the primary author of our Using AutoCAD data in ArcGIS class and assisted in the development of our ArcGIS Server Basics class. 

Ben Sloboda

Ben is a GIS Professional with more than 10 years of experience using GIS.  He has worked in emergency services, transportation, environmental sciences, natural resources, and software development.  He specializes in Python and Web Applications as they pertain to geospatial sciences. 

In addition to working with Geospatial Training Services, Ben is currently the Senior GIS Developer for RTD in Denver, creating and modifying the web and mobile applications used for public transportation.  He has also instructed at Pikes Peak Community College for the last four years, teaching both GIS and GPS classes.  Ben helped develop the Colorado Community College System's GIS curriculum for future technologies and integration of programming within the GIS industry.  He is very active in the GIS community in Colorado, and is on the Board of Directors for GIS Colorado and the Pikes Peak GIS Advisory Board. 

Ben has a Bachelor's degree from the University of Northern Colorado in Environmental Science.  Ben also attended Colorado State University for a Master's degree in GIS and the University of Colorado in Colorado Springs for a Master's degree in Remote Sensing.


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