ITEM 5.02 DEPARTURE OF DIRECTORS OR PRINCIPAL OFFICERS; ELECTION OF DIRECTORS; APPOINTMENT OF PRINCIPAL OFFICERS.

Mesa Laboratories, Inc., a supplier of instruments and consumables for manufacturing quality control applications, on February 25, 2009, announced the appointment of Mr. Evan Guillemin to its Board of Directors. Mr. Guillemin brings extensive experience to Mesa from his role as Chief Financial Officer (CFO) and Analyst at Select Equity Group Inc., a registered investment adviser based in New York City. Mr. Guillemin joined Select Equity Group in 2004 and has managed various aspects of finance and operations at the firm since then, in addition to working as an analyst on the research team. He also oversees direct investments on behalf of the firm and its principals.

Prior to joining Select Equity Group, Mr. Guillemin served as CFO of Alloy Merchandising Group Inc., the successor to Delias Inc. Mr. Guillemin was an executive and board member of Delias Inc., a NASDAQ-traded specialty retailing company. He served as CFO and then Chief Operating Officer of Delias from 1996 to 2003, when the company was acquired by Alloy Inc.

Mr. Guillemin holds a Bachelor of Arts degree from Yale University and a Master's Degree in Business Administration with distinction from Harvard Business School. He serves in an advisory capacity to several local charitable organizations in New York City, where he lives with his family.