Leading Lady for several Texas opera venues, GlayMarie has also had the honor of singing the National Anthem for the Queen's 50th Anniversary Gala, ("Our own Glay Marie Posch gave a stunning rendition..." D Linder, HMS Pinafore, 2001) and has sung "The Star-Spangled Banner" for various patriotic and sports events including the Louisiana Ice Pirates' 2000 season opener in Lake Charles, LA and three consecutive performances for The USS Cavalla Memorial dedication and remembrance. In 2001 she was featured soloist for The Bible in America Museum and annual fund raiser and HBU's President's Luncheon. She has performed as Concert Soloist with Fort Bend Symphony Orchestra, Symphony North of Houston, Houston Civic Symphony, Brasozport Symphony and Mesquite Symphony.

In 2007 GlayMarie debuted with CyFair Lyric Opera as Lalume in Kismet and with The Gilbert & Sullivan Society of Austin (GSSA) as "sweet" Rose Maybud in Ruddigore which garnered her a B. Iden Payne Awards nomination for "Best Female Actress in a Musical". Favorite operatic roles to her credit:Elsie Maynard  (Yeomen of the Guard), Patience (Patience), Rosina (Barber of Seville) and Rose Maybud (Ruddigore). Other roles to her credit are Phyllis (Iolanthe), Nellie Forbush (South Pacific), Lalume (Kismet), Chavala (Fiddler on the Roof), the youngest cousin (La  Perichol), Adlonza/Dulcinea (Man of La Mancha), and Hannah (The Merry Widow). She has sung abroad in England (1998 "Best Female Vocalist" merit award) and also with the Houston Grand Opera, Opera in the Heights, and Washington, D.C. Opera..

GlayMarie has published several CD titles, mini-musicals, and one children's audio book.  She has narrated two children's books and holds active memberships in The Society of Children's Book Writers and Illustrators (SBCWI), the National Piano Teachers Guild, and the National Association of Teachers of Singing (NATS).

Mrs. Posch is a 6th generation Texan and resides near her hometown of Houston with her family. She holds both a BM and MM in classical vocal studies, is an active member of Pi Kappa Lamda Music Honor Society, and has been on the voice faculty at Lone Star College-CyFair and Alvin College. She is now on Adjunct Music Faculty at Lone Star College-University Park and also maintains a selective roster of both voice and piano students at her home studio and at West Oaks Music Studio.

GlayMarie has been the offertory soloist at Berachah Church in Houston, TX since 1990.

Lakeshore Ice Pirates
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Lakeshore Ice Pirates
PoschPhotography 2000
"GlayMarie Posch made a dainty, fine-voiced Phyllis, an English Rose with a clean-as-crystal soprano." E Evans, Houston Chronicle '99