ALUMNAE MEMBERSHIP THE SISTERHOOD OF CHICAGO METROPOLITAN The Chicago Metropolitan Alumnae Association of Sigma Lambda Gamma was established on September 19, 1998 . Our sisterhood consists of women working in all sectors of our society, such as: financial sector, social services, accountancy, law, education and Master’s degree candidates. Many of our members have other obligations outside of the organization ranging from family, parenting, attending courses in higher education and employment responsibilities.