Irving-headquartered companies making the list include Pioneer Natural Resources in the large company category, HCA National Patient Services in the medium company category and Aquire in the small company category.

 

Other companies to earn the honor include Quest Diagnostics Incorporated, a company which operates major laboratory facilities in Irving, CHRISTUS St. Michael Health System, a facility within the Irving-headquartered CHRISTUS system and Transwestern and Aministaff, Inc. -- two companies with an Irving presence.

 

The program is sponsored in part by the Texas Association of Business and the list is published at www.bestcompaniestx.com  and in Texas Monthly magazine.