About
Meet The Team
We are dedicated to assisting individuals with developmental disabilities. Over 70% of our team have been making a difference in the lives of the participants for over a year, many have left to pursue other interests only to return for rehire and 25% have been caring for our agency’s families for 6 -11 years. Our professionals work closely with our direct care staff in the office, homes, and community to extensively train, support, and creatively work as a team. It is our desire to maintain open and meaningful communication to provide the highest quality of service to the participants in our programs.
Heather Walker
Owner/ Administrator
I am the Owner and Administrator of Developmental Concepts, Inc. I began working in this field in 1997, starting as a Developmental Specialist. I have worked as a Service Coordinator for both children and adults, a Program Coordinator and a Quality Assurance Specialist. I graduated from Gonzaga University in 1995 with a dual major in Psychology and Sociology and shortly thereafter moved to Idaho. I am grateful that I am able to use my education, training and many years of experience to positively impact people’s lives every day. Many participants that we provide services to I have known the entire time that I have been working in this field; they are like family to me and I am always pleased at the progress that has been made. I am a very proud mother of three beautiful children; all of my time outside of work is spent with them. They are very active in volleyball, basketball, lacrosse, and competitive cheer. My years in this field have taught me compassion, resilience, gratitude and strength which in turn only make me a better business owner, professional in this field and mother to my children. For that I am extremely grateful.
Mandi Papac
Billing Specialist
I am the the billing specialist for Developmental Concepts, Inc. I graduated from Boise State University with a Bachelor of Science in Psychology. I worked in both Developmental Therapy and Psychosocial Rehabilitation after graduating. In 2006, I joined the team at DCI as a Program Coordinator (currently named Qualified Intellectual Disabilities Professional) in the Residential Habilitation program where I enjoyed working with the participants to meet their greatest potential. After starting a family in 2007 I moved to the billing specialist position. When I am not working I enjoy spending time with my husband and 3 boys, running, volunteering, traveling and spending time in the mountains.
Xenia Worontsoff
Human Resources Specialist
Hello, my name is Xenia Worontsoff, and I am the Human Resource Specialist for Developmental Concepts, Inc. I graduated with a Bachelor’s in psychology from Florida State University and a Master of Business Administration with a concentration in Human Resource Management from the University of Louisiana. I am originally from Texas, but recently relocated to Boise with my fiancé who is a business owner in the area. When I am not at work I enjoy hiking, working out, paddleboarding, and spending time with family and friends. I am excited to be a part of the DCI team and to be able to use my education and experience to grow in this field!
Holly Blankenship
Quality Assurance Specialist
I am the Quality Assurance Specialist for Developmental Concepts, Inc. and my experience in this field began in 2006 while running a home-based daycare. I earned my Social Work degree from Salisbury University in 2016 and have grown personally and professionally through work with children and adults in schools, developmental disability agencies, and assisted living facilities. I am the wife of a military veteran and a mother to three wonderful adult children. When I am not working, I enjoy spending time with family and friends. The best part of working in the social service industry is knowing each day is an opportunity for growth and learning from those we help!
Mariah Robideaux
Director of Residential Habilitation
Hello, my name is Mariah Robideaux. I am the Director of Residential Habilitation here at Developmental Concepts, Inc. when I first started at Developmental Concepts, Inc. in 2023 I worked as a Direct Support Staff Supervisor. I quickly realized how amazing DCI is, and how much the participants are valued, respected, and supported. I have a deep passion and appreciation for all our participants and the work that we do as an agency. I have loved helping each participant I have worked with live their best life and reach their full potential. I have done hourly direct support and worked in various homes with a variety of different participants. Before Developmental Concepts, Inc. I worked as a Residential Habilitation House Lead, Correctional Officer, and Client Advocate. I’m currently finishing my studies in Social Work at Lewis-Clark State College. I am so honored to be a part of Developmental Concepts, Inc. and to work alongside our amazing Administrator and office professionals. I look forward to continuing to serve our participants and support our staff!
I’m a wife and an Idaho native. During my downtime I enjoy hiking, spending time with family, and being on the Boise River with my husband and dogs.