at her home on November 4 2025. Born 1930 in Chicago to Martin and Julia Gronski. Marcia was a proud graduate of UCLA. She earned a degree in Education.
Marcia and Robert O'Brien, who is now 95, have been residents of Thousand Oaks for over 57 years. They were blessed to have a beautiful 64 year marriage.Together they raised three children, Denise, Michael and Eileen.
Marcia had a passion for singing and performing. She especially loved volunteering her time and talents with her singing group 'The Sentimentals.' She loved Sweet Adelines and musical theater. But most of all she loved family gatherings. She was a devoted wife, an amazing mother, the best grandmother and a loving and caring friend to ALL who knew her.
A memorial service for Marcia will be held at Saint Judes Catholic Church 32032 Lindero Cyn Rd Westlake Village, on Saturday November 29 at 12pm, Burial service to follow at 2pm at Pierce Brothers Valley Oaks 5600 Lindero Cyn Rd Westlake Village 91362.
