May They Rest in Peace: Sr. Theresa Sinnamon, OP

Sr. Theresa Sinnamon, OP, formerly known as Sr. Josette Marie, died on Friday, November 26, 2021, at the ProMedica Charles and Virginia Hickman Hospital in Adrian, Michigan. She was 92 years of age and in the 73rd year of her religious profession in the Adrian Dominican Congregation.

Sister Theresa was born in Detroit, Michigan, to Harry and Irma (Demaire) Sinnamon. She graduated from St. David High School in Detroit and received a Bachelor of Philosophy degree in History from Siena Heights College (University) in Adrian and a Master of Education degree from Barry College (University) in Miami Shores, Florida.

Sr. Theresa Sinnamon, OP
Sr. Theresa Sinnamon, OP

Sister spent 27 years ministering in education in Detroit, Grosse Pointe Woods, Ypsilanti, and Adrian, Michigan; Chicago, Illinois; St. Petersburg and West Palm Beach, Florida; and Assumption (Swanton), Ohio. She also served in various other ministries for 32½ years as secretary, pastoral minister, office manager, receptionist, and administrative assistant in Adrian, Detroit, Roseville, Troy, Taylor, and Warren, Michigan. This includes her service for five years as executive secretary for the Adrian Dominican Sisters in Adrian, 10 years as administrative assistant for the Nokomis and Great Lakes Chapter offices in Detroit, and 1½ years as general manager of the Development Office at Siena Heights College. Sister became a resident of the Dominican Life Center in Adrian in 2015.

Sister Theresa was preceded in death by her parents and two brothers, Harry and Lawrence. She is survived by two brothers, James Sinnamon (Vel) of Clinton Township and Edward Sinnamon of Livonia, both in Michigan.

Due to COVID-19 mitigation protocols, the Dominican Life Center is closed to all guests or visitors until further notice. All are welcome to participate in Sister’s wake and funeral via live stream at http://www.adriandominicans.or...

The Vigil Prayer will be held at 7:00 pm Tuesday, November 30, 2021, in St. Catherine Chapel. A Mass of Christian Burial will be offered in St. Catherine Chapel at 10:30 am Wednesday, December 1, 2021. Prayers of Committal will be held in the Congregation Cemetery. Memorial gifts may be made to Adrian Dominican Sisters, 1257 East Siena Heights Drive, Adrian, MI, 49221.

Funeral arrangements are being handled by Anderson-Marry Funeral Home, Adrian.

Sister ministered in Michigan 43 years:

  • St. John High School, Ypsilanti (1960-61): High School Teacher
  • St. Joseph Academy, Adrian (1966-72): High School Teacher
  • Our Lady Star of the Sea School, Grosse Pointe Woods (1972-73): High School Teacher
  • Siena Heights College (University), Adrian (1973-75): General Manager/Development Office
  • Detroit Archdiocese Religious Education Office, Detroit (1975-76): Secretary
  • Adrian Dominican Sisters, Adrian (1976-81): Executive Secretary
  • Maryhaven, Southgate (1981-83): Pastoral Minister
  • Seac Chapter Office/St. Ann High School, Detroit (1983-84): Secretary/High School Teacher
  • De Serrano Residence, Roseville (1984-86): Pastoral Minister
  • St. Anastasia, Troy (1986-87): Secretary
  • St. Donald, Roseville (1987-91): Office Manager/Pastoral
  • Detroit Board of Education/Detroit Center for Religious Development, Detroit (1991-92): Teacher/Administrative Secretary
  • Detroit Center for Religious Development, Detroit (1992-93): Office Administrator
  • Detroit Public Schools, Detroit (1993-96): Adult Education Teacher
  • St. Alfred Parish, Taylor (1996-97): Receptionist/Secretary
  • Macomb Community College, Warren (1997-98): Receptionist/Secretary
  • Nokomis Chapter Office, Detroit (1998-2002): Administrative Assistant
  • Great Lakes Dominican Chapter Office, Detroit (2002-08): Administrative Assistant

Obituaries for clergy and religious who have lived or served in the Archdiocese of Detroit may be emailed to [email protected]. Obituaries are printed as they are submitted, but may be edited for grammar and style. Detroit Catholic reserves the right to refuse or edit any submissions.


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