Cary Sayre obtained a Master of Science in Agricultural Engineering with emphasis in Environmental Quality and a Bachelor of Science in Agricultural Engineering from University of Missouri-Columbia. Cary has been Chief Engineer of the Marceline office of Allstate Consultants since it opened in 1998. In 2000, he became a Principal of the firm. He is responsible for a broad scope of projects including sanitary landfill design, two stage clarification water treatment facilities, lime softening water treatment facilities, rural water distribution systems, elevated water storage reservoirs, municipal water distribution systems, earthen dam construction, sanitary sewer collection and sewage treatment facilities. He is also involved in construction administration and inspection of these types of projects and has completed a considerable amount of expert testimony. Cary is licensed in Missouri, Kansas and Iowa.

Cary has served as Vice-Chair of the Environmental Committee for the American Council of Engineering Companies of MO (ACEC-MO) and has been on the Curriculum Review Committee for the University of Missouri-Columbia Biological Engineering Program.