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CAL-IN Technology Transfer is a technical consulting company primarily serving the environmental indoor air quality sector. We are based in Roseville, California.  We have a long standing commitment to the study of indoor environments and the dynamic interaction between occupants, contaminant sources and building materials and systems. Our staff of professional engineers, analysts, operations and finance executives have over 25 years experience in IAQ and bring a multi-disciplinary approach to provide innovative solutions to a broad range of engineering, environmental and technical challenges.


To learn more about our company officers, please follow the links below:

Shannon M. Hollsten, Ph.D., M.B.A. - Chairman and Chief Executive Officer

Daniel M. Beck, M.B.A.- Chief Analytics Officer

Bo Erik "Gustavo" H. Ruvalcaba- Chief Technical Officer

Karilyn Edwards, C.P.A. - Senior Accountant

If you would like more information about any of our services, please contact us.