Sigma has extensive experience and expertise in servicing a diverse group of industries, both private and public. Government At Sigma, we help government agencies use technology to operate more efficiently and cost-effectively Healthcare Sigma enables healthcare organizations to focus on patient care, by providing proven expertise in IT solutions that support clinical and back-office applications. Uptime Newsletter Click here to read our Sigma Uptime newsletter. Videos Watch our videos to learn more about Sigma. WSCA We participate in The Western States Contracting Alliance (WSCA).