Yes, they were known as SS-Helferin or "female SS-helper" but they were never given any position titles or equivalent ranks of the SS and could never outrank a man. There were around 55,000 guards who served in concentration camps and only about 3,700 were women.

The supervisory levels within the SS-Helferin were as follows:

1. Chef Oberaufseherin, "Chief Senior Overseer" [Ravensbrück]
2. Lagerführerin, "Camp Leader"
3. Oberaufseherin, "Senior Overseer"
4. Erstaufseherin, "First Guard" [Senior Overseer in some satellite camps]
5. Rapportführerin, "Report Leader"
6. Arbeitsdienstführerin, "Work Recording Leader"
7. Arbeitseinsatzführerin, "Work Input Overseers"
8. Blockführerin, "Block Leader"
9. Kommandoführerin, "Work Squad Leader" [Senior Overseer in some satellite camps]
10. Hundeführerin, "Dog Guide Overseer"
11. Aufseherin, "Overseer"
12. Arrestführerin, "Arrested Overseer"

Maria Mandl, a female guard who was an Austrian SS guard and would end up as a top ranking official Lagerführerin, "Camp Leader" at Auschwitz. It's actually suspected that she was directly involved in over 500,000 female prisoner deaths. Her nickname was "The Beast" and was arrested by the United States Army in 1945 and was executed in 1948.

Another was, Irma Grese an SS guard at Ravensbrück & Auschwtiz and also served as warden in the women's section of Bergen-Belsen concentration camp. Grese participated in the prisoner selections for the Gas Chambers at Auschwitz. Inmates at Auschwitz nicknamed her the "Hyena of Auschwitz". She was actually captured by the British Army in 1945 and was executed at the age of 22. She was the youngest woman to die judicially under British Law in the 20th century.

Ilse Koch, inmates in concentration camps called her the "Witch (or replace it with a b) of Buchenwald". She was one of the first prominent nazi's that was tried by the U.S. Military and the wife to Karl- Otto Koch who commanded over Buchenwald concentration camp and Majdanek. Authors described her abuse to prisoners as sadistic. I won't go into detail about the vile, gruesome things that she had done to inmates. But let's just say it had a lot to do with human skin. She was sentenced to life in prison in 1951 and would end up hanging herself at Aichach women's prison in 1967.

There are more that can be named, but these are a few of the infamous women that held a lot of power during WWII in Nazi Germany. Hope this helped!