Supporting Our Sisters International is dedicated to increasing breast cancer awareness, improving continuum care and services.

Our support group meetings will be the 3rd Saturday of each  month.
We will meet on March 17, 2018

Time: 1- 3PM
Kaiser Permanente
Mercantile Lane, Upper Marlboro, Maryland 20774

We welcome new ideas and value enthusiasm from
members and volunteers.

Dear SOSI Team,
Thank you all for coming and joining us here today. We are pleased to be able to welcome those of you that have been with us for some time now as well as those of you who are new to our SOSI group. I would like to express my gratitude to all of you who so generously help us make our monthly meetings come together smoothly... We need you as much as you need us.


  1. “I have learned over the years that when one's mind is made up, this diminishes fear; knowing what must be done does away with fear.” ―Rosa Parks
  2. “There are still many causes worth sacrificing for, so much history yet to be made.” ―Michelle Obama
  3. “To every woman who gave birth to every taxpayer and citizen of this nation, we have fought for everybody else’s equal rights. It’s our time to have wage equality once and for all and equal rights for women in the United States of America.” ―Patricia Arquette
  4. “I declare to you that woman must not depend upon the protection of man, but must be taught to protect herself, and there I take my stand.” ―Susan B. Anthony
  5. “Imperfection is beauty, madness is genius and it's better to be absolutely ridiculous than absolutely boring.” ―Marilyn Monroe
  6. “You've got to love yourself first. You've got to be OK on your own before you're OK with someone else. You've got to value yourself and know that you're worth everything.” ―Jennifer Lopez
  7. “A woman is like a tea bag - you can't tell how strong she is until you put her in hot water.”  ―Eleanor Roosevelt
  8. “Be thankful for what you have; you'll end up having more. If you concentrate on what you don't have, you will never, ever have enough.” ―Oprah Winfrey
  9. “That is the motto women should constantly repeat over and over again. Good for her! Not for me.” ―Amy Poehler
  10. “There are two kinds of women, those who want power in the world and those who want power in bed.” ―Jacqueline Kennedy Onassis
  11. “We realize the importance of our voices only when we are silenced.” ―Malala Yousafzai
  12. “We are not free until all of us are free. So love your neighbor, please treat her kindly. Ask her story and then shut up and listen...Be a voice for all those who have prisoner tongues.” ―Halsey  


We are all in this together – and we are glad you are visiting our site. This is our online meeting place, where we organize our activities, share ideas, and publicize our mission.

Contact us here.


Supporting Our Sisters International®

History & Mission

Supporting Our Sisters International (SOSI) founded by Madeline “MAD” Long-Gill, a survivorship organization was created to improve continuum care among African American and Hispanic breast cancer survivors. The goal of the organization is to help reduce breast cancer mortality for African Americans and Hispanics by focusing on health education for survivors.


Madeline established SOSI after many years of direct services as a training instructor for public assistance recipients, a homicide minister, domestic & sexual violence advocate, and a volunteer of 12 years with the St. Louis affiliate of Susan G. Komen Foundation. She served as President of Sisters Network Prince George’s County, an affiliate of Sisters Network Inc. These coupled experiences helped her understand the importance of health equity for all breast cancer survivors. Under her leadership, the awesome executive team of Sisters Network Prince George’s County reached over 10,000 people in less than 2 years through community health programs, workshops and medical screening participation. 


SOSI was created to support sisters worldwide with a message of health, hope, healing and quality care. Although the color pink represents breast cancer, SOSI has chosen to add a hint of green to denote living green aimed at helping women live healthier lifestyles to reduce their risk or recurrence of breast cancer.


SOSI has joined forces with survivors, family, friends, healthcare providers, researchers, community stakeholders, faith-based communities, and national organizations to create informative change within the breast cancer movement. SOSI believes we must support one another if we are to be the change. It will take all hands on deck to prevent and save lives!


Our mission: Through our exceptional attention to service, we are dedicated to saving lives by going beyond breast cancer awareness to empower, educate and inspire women around the world. We are committed to improving continuum care and services for the minority and under-served the community.

SOSI Timeline


1995    Madeline’s mother-in-law Carolyn L. Gill passed away from complications related to breast cancer


1999 – 2012   Madeline Long-Gill volunteered with Susan G. Komen Foundation


2011    Madeline L. Gill, Josephine Long (mom), Mary Gabourel             (aunt) were diagnosed with breast cancer


2013    Opened chapter of Sisters Network Prince George’s County


2013 – 2014   Reached 10,030 people in Maryland, DC and Virginia area


2015    The creation of Supporting Our Sisters International to reach women nationally with a survivor-ship message of hope

Supporting Our Sisters International

P.O. Box 1341
Landover, Maryland 20785
Phone: 301-494-7315