The "Amazing" Alpha Omicron Sigma chapter was chartered December 29, 1944 by seven distinguished women: Soror Mary Carter-Southwest Regional Syntaktes, Soror Maudies Baker, Soror Juanita Hall, Soror Lurlean Hillard, Soror Myrtle Joiner, Soror Lillie Jones, and Soror Illistene Webster.

The graduate chapter advises three undergraduate chapters in the North Texas area. They are Gamma Iota at Paul Quinn College, advised by Danisha Bob, Eta Alpha at the University of North Texas, advised by LaTisha Brandon, and The University of Texas - Dallas, advised by Leslie Chatman.

The chapter has an extremely active rhoer and philo club.

Alpha Omicron Sigma received the SW Regional Award in 1970 for the most Outstanding Program instituted of the year.
Distinguished Sorors of the chapter Quindonell Robertson, SW Regional Campus Chapter Coordinator (1963 -1967) , SW Regional Syntaktes (1967-1971), member of the National Board of Directors (1967-1971) and National Boule Hostess 1971;

Jennifer Jones, SW Regional Tamiochus (2000-2002), International Sgt - At - Arms (2000 - 2002)

Karla Smith, Esq, International Legal Advisor

Dr. Jacquecola Lott, SW Regional Epistoleus (2000 - 2001),

Henry Etta Johnson-O'Neal, SW Regional Undergraduate Chapter Coordinator and International Board Member (elected 2002)
Southwest Region Grammateus (2008-2010)

Outstanding Soror of the Year Dr. Jacquecola Lott

Outstanding Contribution Award from Dallas Pan Soror Henry Etta Johnson-O'Neal

Eta Alpha is the Southwest Undergraduate Chapter of the Year for 2006-2008.

Alpha Omicron Sigma holds the title for best Scrapbook Display for the Southwest Region 2006-2008.

Miesha Byrd, Southwest Regional Elections Chair (2008-2010)

Past Chapter Basileus include Soror Lillie Jones, Maudie Baker, Erma George, Lorrayne Jordan, Maurine Stevenson, Ruby Thompson, Vassie Bell, Quindonell Robertson, Johnnie Willis, Carolyn Lewis, Jennifer Jones, Dr. Jacqueola Lott, Henry Etta O'Neal, & Paula Alexander.