Seiler Instrument is a contract manufacturer specializing in high precision machining and optical instrument assembly. In addition, Seiler is a distributor of surveying software and instruments, microscopes, and Zeiss Planetarium equipment. Seiler Instrument consists of 5 main divisions including Manufacturing, Geospatial, Medical, and Planetarium. Seiler’s corporate headquarters is located in St. Louis, Missouri, with additional Geospatial sales offices in Indianapolis, Kansas City, Milwaukee, Omaha, and Chicago. Optical instruments have been a Seiler family tradition since 1913 when company founder Eric H. Seiler entered the Zeiss School of Fine Optics in Jena, Germany. After earning a Master’s degree in Fine Optics, Eric H. Seiler brought his craft to the United States where he and his wife, Dora L. Seiler, started Seiler Instrument and Manufacturing Company in 1945. With Eric H. Seiler’s knowledge of optics and the business management knowledge from his son, Eric P. Seiler, the company flourished.