Senior Management

Walnut Street Center is able to offer the services it does thanks to all of the amazing staff and support workers who are a part of the organization and work tirelessly to provide their skills and services year after year. The relatively small Senior Management team has a combined 100+ years of experience in the human services field, and have all worked to improve and build upon Walnut Street Center’s programs and offerings during their time with the organization. With the ability to have a completely hands on and personalized approach because of the size of the team and the center, they each bring their passion, as well as their skill, to the management of Walnut Street Center.

carolyneChief Executive Officer
Carolyne Guffey

Carolyne came to Walnut Street Center in November 2011 as Chief Operating Officer with 26 years’ experience in the human service field. Carolyne’s previous experience includes direct care positions, human resources, and operational management. Carolyne brings a unique combination of operational and management expertise to Walnut Street Center’s leadership team. Ms. Guffey holds an Associate Degree in Nursing from Bunker Hill Community College, a Bachelor of Arts degree, with a focus in management and organizational psychology from Cambridge College and a Master of Business Administration from Norwich University. She began her current role as CEO of Walnut Street Center at the beginning of 2017 and was key in the move to the new Medford location.

juan-gChief Financial Officer
Juan Gomez

Juan began his association with Walnut Street Center in May 1999 as the chief financial officer. Juan has over 16 years’ experience in human services and has a comprehensive understanding of the finances as they relate to the field. Juan is an intricate part of the Walnut Street Center leadership team who strives daily to realize the agency’s mission.

Director of Human Resources
Susan Hawes

Susan joined Walnut Street Center in December of 2018.  She is a seasoned professional with more than fifteen years of experience in Human Resources encompassing all facets of Risk Management and Human Resources in a multi site and multi state environment.

An energetic leader with a strong focus on professional development, incentive, and motivation. Solid knowledge of labor laws, benefits administration and plan design, compensation and recruitment and the effect they have on organizational strategy. Ability to work effectively with all levels of the organization to support strategic initiatives. Proven ability to diffuse highly charged situations.  Susan has her Bachelors degree and Masters from Suffolk University.

My goal is always to make things better for the employees.  I believe that making a difference in an organization like this makes things better for the individuals we serve.


Director of Operations
Eva Osagiede

Eva began her association with Walnut Street Center in December 2012 as the Assistant Director of Residential Services. Eva has over 13 years’ experience in the human service field with a strong focus on residential services and individual supports. Eva was promoted to the Director of Residential Services in August 2014 after demonstrating a proven ability to provide leadership to a multidisciplinary staff team and to provide the highest quality services across at all times.

Eva was promoted to Director of Operations in November 2018. She now oversees the day-to-day operations of Residential services, day program services, and individual supports.

Director of Quality Assurance and Training
Suzanne Henderson

Suzanne joined Walnut Street Center in January 2017. She strives to find the delicate balance of passion, vision, details and data that allow an organization’s mission to shine. Suzanne has over 15 years’ experience in human service management, including residential operations, quality assurance, training, and licensing/certification. She has a degree in Cognitive Science from Johns Hopkins University, with continuing education and credentials in housing, quality improvement, and business. Suzanne believes that people of all abilities should be lifelong learners, and she appreciates being the trainee as much as the trainer.

Director of Day ServicesSara OBrien
Sara O’Brien

Sara began her journey with Walnut Street Center as a Residential Program Coordinator in December 2014. In May of 2016, she transitioned to Day Services in the capacity of Community Based Day Supports Coordinator before taking on the role of Director of Day Services in April 2019. With over 10 years of experience in the Human Service field, Sara’s compassion and focus on person centered programming brings a great sense of community for those served by Walnut Street Center.

Director of Residential ServicesColeen 133x300
Coleen Levasseur

Coleen joined Walnut Street Center in 2015, and brought with her decades of experience working in Social Services.  Prior to Walnut Street Center she worked in various roles throughout her extensive career that include a Manager, Coordinator and Residential Director.

Her favorite quote reads, “Tell me and I forget, teach me and I remember, involve me and I learn.” Attributed to Benjamin Franklin, the message is practiced and role modeled by Coleen for all staff to see.  Coleen brings to her new role as Director of Residential Services, a consistent approach to services while promoting independence for all people living in our community homes.  She goes above and beyond in promoting each person to become an active member of their community while pursuing the interests that are most important to them.

In her free time, you can find her at concerts enjoying live music, driving in her convertible to Maine, traveling, or relaxing at home with a good book.

Board of Directors:

John Mahoney

Stephen Prescod

James Griffiths