Job Description - Administrative Assistant 1 (240000IV). Job Description. Administrative Assistant 1 - ( 240000IV ). Description. MLGW is the nation’s largest three-service municipal utility, serving over 440,000 customers representing diverse backgrounds. Since 1939, MLGW has met the utility needs of Memphis and Shelby County residents by delivering reliable and affordable electricity, natural gas, and water service. We provide a full range of c...