Gretchen Cook, Director of Operations

Gretchen joined COSI in January 2011 as our Program Manager. She graduated from the University of Washington with Bachelor degrees in both Design Studies and Women Studies. She completed her MBA from Whitworth University to help COSI grow. She helps keep the big picture goals in motion to allow COSI to grow in a manageable way. Things have changed dramatically at COSI since 2011, keeping her on her toes and the office growing.

When she is not working Gretchen enjoys quiet weekends at home with her husband and daughters. She has a zeal for the crafty/handmade side of life, and gets to exercise her creative brain through modern quilting and longarming, or making something fabulous in the kitchen.

Bill Bloom, Training Manager

Bill joined Circle of Security International in February of 2014. He graduated from Pacific Lutheran University with degrees in English Literature and Fine Arts. Bill has worked in a wide variety of small business settings, usually involved in creating systems and keeping clients happy. For COSI, Bill helps coordinate all of the trainings and is the main point of contact for sponsors.

When not at his desk, Bill can be found spending time with his wife and daughter, outside running and cycling, or down in his basement working on his letterpress.


Andy Cook, Digital Media Producer

Andy has worked for COSI, helping out in busy times, on and off since 2011. He began as the Accounts Administrator in November 2013. In 2017, Andy became our Digital Media Producer, utilizing his degrees in music production from Spokane Falls Community College and in Broadcast and Electronic Media Studies from Gonzaga University.

When not working, Andy enjoys playing music, woodworking, and spending time with his wife and daughters.



Angela Dierdorff, Office Manager

Angie joined COSI in October 2015 as our Office Administrator. She has a Bachelor of Arts in English Literature with a Theater minor from Eastern Oregon University. Angie has worked for various non-profit organizations in communication and event coordination, and spent the last five years working as a bookkeeper. Among other responsibilities for COSI, including editing the website, Angie works to make sure your many inquiries are responded to in an accurate and timely manner.

In her spare time, volunteers for her son's high school, writes for local publications, performs in area theater productions, and looks after the chickens, cats, rabbit, dog and boys with whom she shares a home.


Becca Powell, Accounts Administrator

Becca Powell spent the last 5 years serving as director of multiple programs in the non-profit sector.  Seeking a new adventure and change of pace, Becca joined the Circle of Security International team in early 2017 as the Accounts Administrator and Registrar.  When not answering emails for Circle of Security, she is practicing the protocol at home with her 4 amazing teenagers.  In her downtime, you can find her enjoying activities with her family, practicing yoga, and reading.