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Mark Krajecki began their work experience in 1976 as the Director of Production at Bugle Publications. Mark held this role until January 1997. In September 1997, they joined the American Academy of Pediatrics as a Journal Production Specialist, and the end date for this role is unknown.

Mark Krajecki attended the O'Reilly School of Technology from 2010 to 2011, where they completed a Professional Development Course in Introduction to HTML and CSS. Prior to that, from 1979 to 1981, they studied at Triton College and obtained an Associate of Applied Science A.A.S. degree in Photo Offset. Mark completed their high school education at Maine South High School in Park Ridge, IL between 1973 and 1976, but no degree or field of study is specified for that period. It is known that Mark Krajecki pursued a BSTM (Bachelor of Science in Technical and Supervisory/Management) at DeVry University, although the exact dates are not provided. In terms of additional certifications, Mark obtained the Windows 10 Essential Training certification from LinkedIn in April 2022 and completed the Photoshop 2021 Essential Training: The Basics certification from LinkedIn in March 2022.