NCCJ’s Professional Team

Mary TylerMary E. Tyler, Executive Director – Mary took the helm of NCCJ in March, 2012. Prior to joining NCCJ, she completed 25 years of a rich and fulfilling career in the United Way Movement, which included six years as CEO of the United Way of Gaston County, NC. Mary is known as a dynamic professional with a proven track record of inspiring strategic direction, extensive experience in training and development, and over 20 years of program development and management experience. During her United Way career, she served in a variety of leadership roles within the Diversity and Inclusion Council, including serving as co-chair for the National Diversity Conference in Los Angeles, CA.

Mary is skilled in creating a culture that fosters positive, sustainable change and peak performance. She is an accomplished facilitator who offers customized applications. Her passion and abilities are evident as she energizes participants, encourages shared experiences and learnings, and skillfully supports the development process in pursuit of innovative opportunities. Mary believes in serving the community and uses her skills and talents to help strengthen organizations that impact the lives of individuals and families throughout the area. Mary has a bachelor’s degree from Belmont Abbey College, Belmont, NC. A native of Dayton, Mary is happy to be back home, close to her family, and where she can work out with her daughter.


Angie Joneangies, Finance Manager – Angie has an all-encompassing work history, which is an important complement to the organization.  She previously held a long-time position with the Ohio Head Start Association, Inc., a non-profit, as the Operations and Events Manager.  Angie wore many hats in this position, and she was able to design and develop her own organizational systems and structure over two decades.  Her knowledge and experience in accounting and office and events management is a benefit to our organization.


Tabani Manyika ,Marketing Assistant and Youth Events Coordinator – 

Tabani was born and raised in Maryland and graduated  from Lyncburg College located in Southern Virginia with a bachelors in Communication .He became an Ohio resident in 2014. Since his move to Ohio he had the opportunity to intern with the Kettering Moraine Oakwood Chamber of Commerce serving as the Social Media analyst. Tabani then worked at Speedway Corporate as a leave analyst and a  workers compensation specialist and continued to develop his skills as a young professional . Not too long after that, he became a AmeriCorps VISTA as a Social Media and Marketing assistant for NCCJ .

After his year of service Tabani decided to continue to work with NCCJ as Co-Coordinator for Police and Youth Together and Youth Event Coordinator along side working at the Montgomery County Juvenile Probation Center as a diversion officer. Tabani is currently pursuing his Masters Degree in social work at Wright State University.

Contract Associates

Len Roberts 

Len Roberts is a native Daytonian. He is a product of the Catholic school system, and a graduate of Chaminade High School.  He has a Bachelor of Philosophy degree from Wayne State University in Urban Studies.  In addition, he has a Master of Arts in Teaching (MAT) from Antioch College, and a Master of Public Administration (MPA) from the University of Dayton.  He is currently retired after a career of over 40 years in education and government.  After college, he taught humanities and government at Chaminade.  While at Chaminade, he partnered with Bing Davis developing a curriculum for a three day workshop in race relations for high school students.

Len’s first love is politics.  He took advantage of an opportunity to join the campaign staff of John J. Gilligan focusing on college campuses and the minority community.  After Gilligan’s successful campaign he joined the governor’s staff as Special Assistant to the Chief of Staff. Returning to Dayton, he accepted a position with the City of Dayton, for a 12-year career in the Model Cities planned Variations program and the City Manager’s Office.

He has been very active with various youth serving and arts organizations in the Dayton area. For over 30 years he has been a volunteers with the Boy Scouts of America.  As such he has served in positions ranging from Assistant Scoutmaster, to President of the Miami Valley Council, to Area Vice-President.  Len has also done over a hundred leadership training courses for youth and adults.  In the past, Len has served on the boards of Culture Works, DCDC, and Chaminade-Julienne High School.  Currently, he serves on the boards of DATV, Miami Valley Council Boy Scouts, and K-12 Gallery.

Len has been an associate of NCCJ-Dayton for 10 years.  During that time he helped design the curriculum and deliver the Students Promoting Inclusion, Diversity and Equity in Education (SPIDEE) program at Yellow Springs High School, and the Agents of Change program at Xenia High School and Fairfield Schools.


Susan Sibbing


Susan is a native of the Greater Dayton area and knows the city and small towns of the Miami Valley well.  She has extensive experiences in human services and started her involvement as a community organizer and manager of various local political campaigns.   At Council of Rural Service Programs Head Start, Susan gained experience working with and getting to know the people in eight of the rural counties that surround Dayton. She has lived in the City of Dayton and been involved with a variety of human service and community building projects within the city.

As a graduate of Wright State University and a Licensed Social Worker she began developing and delivering training in the area of diversity, inclusion and human relations in the early 1990s with Head Start.   In 2003, she became the program developer for The National Conference of Community and Justice in Dayton. At NCCJ she created workshops and programs dealing with racism, sexism, disabilities, classism, and gender issues for people from pre-school age to seniors living in retirement communities. Susan also strengthened the Anytown curriculum and led the development of Agents of Change, Students Promoting Inclusion, Diversity and Equity in Education (SPIDEE), Circles of Change, Changing in the Middle, and Police and Youth Together (PAYT).  Susan has a passion and commitment to making the world a better place for all people regardless of background


Levon Simmons, Ph.D.

levinBorn and raised in Texas, son of a Farmer/Sharecropper.  A Farm worker meant making a living first and school second.  Did not start School until age eight, because he had to baby sit his younger brother who was age six. Starting school at age eight caused him to suffer much ridicule by fellow students for being older.  As such, he suffered bullying.  He studied hard and become the smartest student in class, graduating as Valedictorian of his Middle School.

He dropped out of High School to join the Air Force.  He earned his GED and started college.  He went from a High School dropout to a Ph.D., within eight and one-half years, graduating with honors, while serving on active duty in the Air Force.  He earned his Bachelor of Science Degree from Florida State University, his Master’s Degree from Chapman University, and his Ph.D. from Unites States International University.

He developed Race Relations, Human Relations, Multicultural/Diversity training courses for the Department of Defense and Military services.  He trained Instructors to train all members of the Military Services, both Military and Civilians, in an effort to combat racism and prejudices.  After retiring he served as a School Principal, worked for NCR Corporation, a Global company with offices in 122 countries, where he won the Global Diversity Leadership Award in 1998 while serving as the Conflict Resolutions Officer.

Levon is married, and he and his wife have four sons, all earned college degrees, and attended Graduate Schools.

Lisa Singh

No-pic-150x150Lisa Singh is a cross-cultural communications specialist in international executive development, diversity and inclusion, conflict management and strategic planning for global business expansion. She studied in the Antioch post graduate program in partnership with the Intercultural Communications Institute and for a BA in Psychology from the University of Illinois.  She speaks four languages (English, Hindi, Bahasa Indonesia, and Spanish) and has worked and has lived or done business with Indonesia, India, Europe, China, Singapore, Great Britain, France, and Canada, as well as some South American and African countries.  She began her career in cultural training while living in Indonesia and was recognized for how successfully she managed working with different cultural contexts within the country.

Lisa has developed a number of international programs for major organizations and worked to encourage conflict resolution throughout the world. In addition, Lisa’s programs have included such topics as global leadership, international team building, global and domestic diversity, international conflict resolution, and negotiation skills.  Lisa spends some of her time as a facilitator for global problem solving with Ideaconnection in which she leads global teams of scientists and professionals to solve a complex industry issues.  Through Ideaconnection Lisa has been recognized for achievements as a facilitator.  Also, she advises local organizations about cultural sensitive issues with regard to immigrant issues, advises mediation organizations concerning cross cultural issues, Lisa often gives presentations on cross cultural issues, intercultural communication issues in international management, as well as conflict management.