For some projects, Callahan Consulting engages in partnerships with other senior consultants, who are carefully selected for their expertise, skills, and/or artistic background.

Gene Scanlan founded eScanlan Company, a nonprofit management consulting firm, in 2001 and has since worked with a number of local, regional, national, and international clients. Prior to that, he spent 18 years as Vice President and Senior Vice President of The Alford Group Inc., a national consulting firm. He received the first Alford Group Outstanding Employee Award, which was named in his honor and is now presented annually. He has also served as a foundation program officer and fiscal manager at The Chicago Community Trust, the foundation officer for The Brookings Institution, the Director of Development for Defenders of Wildlife, and as an independent consultant to several organizations. Prior to his career in development, he spent 10 years as a college and university administrator. In addition to his consulting work, Gene holds several academic appointments, including ones at the University of Maryland University College, the Elliott School of International Affairs of The George Washington University; and the George Mason University Nonprofit Management Program. Gene has been an active member of the Chicago and Greater Washington, DC Chapters of the Association of Fundraising Professionals and was the DC Chapter's 1994 President. In November of 2003, he received the Outstanding Professional Fundraiser of the Year Award from AFP's Greater Washington DC Chapter. A frequent presenter and author, Gene has conducted workshops, seminars and presentations for associations, organizations, annual meetings, and conferences, including for the State Department's International Visitors Programs. He has published a major book on Corporate and Foundation fundraising, and has also published several articles on nonprofit management and fundraising.

Carmen Boston works with state arts education managers across the country on professional development and state arts education programming initiatives. In addition, she is an advisor to Coming Up Taller, a program of the President's Committee on the Arts and the Humanities that recognizes outstanding after-school and out-of-school programs for children and youth. In addition, Boston has worked for Washington Performing Arts Society, Liz Lerman Dance Exchange, Wolf Trap Institute for Early Learning through the Arts, Jacob's Pillow Dance Festival and Very Special Arts, where she had the opportunity to develop and manage an array of arts projects for adults and youth from diverse populations. Boston received her bachelor's degree from Mount Holyoke College and a Professional Diploma in Community Dance from the Laban Centre for Movement and Dance in London. Through her experience at Laban, she interned with diverse community-based arts organizations, including English National Ballet (London) and City Moves (Aberdeen, Scotland) to gain teaching exposure with different populations and ideas for program development and management. As a board member of the DC Arts and Humanities Education Collaborative, Boston co-chairs the Arts for Every Student program committee, which focuses on arts experiences for DC public and charter school students.

Don Glass is a visual artist and educator who has held positions at the Annenberg Institute for School Reform at Brown University and the Philadelphia Education Fund. He has done education evaluation consulting for the Louisiana Division of Arts, the Rhode Island Department of Education, the Academy for Educational Development, the Education Development Center, and the Center for Arts Education. Mr. Glass presented at the American Evaluation Association conference on his doctoral research on building capacity in arts and culture curriculum design and evaluation in South Africa.

Diane Mataraza is President of Diane L. Mataraza, Inc., an arts management consulting firm based in Florida. Diane's record of accomplishment as an arts educator, a non-profit arts administrator, a federal arts funder and as a director of a national foundation in the entertainment industry has provided a breadth of practical experience, which is now applied to helping others thrive. Recent projects have included reports for local and state arts agencies in California, Florida and Ohio, as well as assessments for Philadelphia based organizations as part of the Philadelphia Cultural Management Initiative, funded by the Pew Charitable Trusts. From 1999-2001, Diane was Senior Vice President with ArtsMarket, a national consulting firm specializing in cultural planning and marketing. From 1997-1999, she served as the Executive Director of the National Academy of Recording Arts and Sciences Foundation (the Grammy Awards) based in Santa Monica, California. She was Director of the Local Arts Agencies Program at the National Endowment for the Arts in Washington, D.C. from 1992-96. In her last year at the NEA under the chairmanship of Jane Alexander, Diane served as Senior Advisor to the Deputy Chairman. Prior to the NEA, Diane directed the Alliance of New York State Arts Councils, the lead advocacy organization for the arts in New York State. She represented the arts community on the Governor's Arts Award Committee; the NYS Senate Committee on the Culture Industry; the Business Council of New York State's Tourism Advisory Committee and the State Education Commissioner's Advisory Committee. Diane ran the Dutchess County Arts Council and its United Arts Fund in Poughkeepsie, New York, from 1979-1984. A trained musician, Diane taught high school instrumental music in New York's public schools from 1974-1978. She is the 1998 recipient of the Selina Ottum Award presented by the NEA and Americans for the Arts. Diane holds a B.A. (cum laude) from Ithaca College School of Music, an M.A. from New York University and a Certificate in association management from the U. S. Chamber of Commerce.