Welcome to Alpha Sigma Tau Sorority! For more than 115 years, Alpha Sigma Tau has been empowering women to excel in life. The Sorority Invests in women by instilling the skills necessary to navigate life and inspire members to enrich their own lives and the lives of others. After graduation, sisters may be involved in an Alumnae Chapter or Association. The Lowell Alumnae Chapter of Alpha Sigma Tau is located in Lowell, MA and was installed in 1991.