Leadership
Christopher Callahan, CEO
Christopher Callahan is responsible for driving the strategic direction of one of the nation's most-watched PBS stations as CEO of Arizona PBS. Callahan also is the founding dean of Arizona State University's Walter Cronkite School of Journalism and Mass Communication, leading a 150-member faculty and staff and 2,000 students.
Mary Mazur, General Manager
Mary Mazur is an award-winning television executive who joined Arizona PBS in 2017. In her role as general manager, Mazur leads more than 65 full-time employees, guiding program development, production, community engagement, strategic partnerships, marketing and philanthropy.
Mark Lodato, Associate General Manager, Innovation and Design
Mark Lodato works to establish new strategies for integration, engagement and collaboration between Arizona PBS and the Cronkite School in his role as associate general manager for innovation and design. Lodato also serves as assistant dean of the Cronkite School, supervising the broadcast and sports curriculum.
John Misner, Senior Adviser
John Misner is a veteran broadcast executive, who led Phoenix’s highly rated NBC affiliate for more than a decade. He serves as a senior adviser to Arizona PBS and teaches and mentors students at the Cronkite School. He also serves as a senior advisor to the Arizona State University Foundation, assisting with development efforts and with the Central Idea and Sun Devil 365 initiatives.
Ian MacSpadden, Chief Technology Officer
Ian MacSpadden brings to Arizona PBS more than 25 years working for local, national and international news and broadcast organizations, including ABC News, NBC Universal and Reuters. He joined Arizona PBS in 2015 as director of broadcast operations, overseeing all station technical operations, including planning, installation operation and maintenance of broadcast systems. He now serves as chief technology officer.
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Tricia Shields, Director of Finance and Administration
Tricia Shields, Director of Finance and Administration, provides Arizona PBS financial reporting, manages accounting and finance operations, Corporation for Public Broadcasting compliance, and sponsored project administration. As the Station continues to innovate and grow, she leads strategic, capital and operational planning to manage and forecast Station funding needs. More than a decade of non-profit finance, audit and management experience has enabled her to stay agile while meeting evolving Station needs. Tricia is active on multiple non-profit Boards, continuing to advocate for diverse causes.
Maureen West, Acting Communications Manager
Maureen West teaches newswriting to graduate students and undergraduates. She was previously a reporter and editor and for The Arizona Republic, and a correspondent for The Chronicle of Philanthropy, the AARP Bulletin, and wrote for the Center for Public Integrity. She is a graduate of the University of Iowa’s School of Journalism. She earned a master's degree in nonprofit studies at ASU and holds a graduate certificate in program evaluation from Claremont Graduate University. She is a former Knight Fellow at Stanford University.
James Scriven, Creative Services Director
James Scriven is the creative services director at Arizona PBS, where he oversees overall design and branding for the station across broadcast and digital platforms. Scriven brings 20-plus years of design experience, including work at television stations in Phoenix and Tucson, Arizona, as well as corporate agency work.
Allysa Adams, Executive Producer
Allysa Adams has been reporting and producing for television for more than 25 years. She’s worked as an on-air reporter and producer for local television stations, national news outlets and various cable shows including CBS News, National Geographic TV and KNXV-TV. In addition to overseeing Horizon and Horizonte, Allysa also produces stories for both shows. She loves storytelling and talking to people across the state about the issues and stories that matter to them.
Kimberly Flack, Associate General Manager of Educational Outreach
Kimberly Flack has served as associate general manager for educational outreach at Arizona PBS since 2010. Prior to that, she was associate director for educational outreach, after joining the station in 2001 as an instructional specialist coordinator on the professional development team remotely located in Flagstaff, Arizona.
Mardi Gradolf, Director of Development
Mardi Gradolf is responsible for securing major and planned gifts from individuals, foundations and corporate partners in support of Arizona PBS. Prior to Arizona PBS, Gradolf served as the associate director of development at The Nature Conservancy and the College of Liberal Arts and Sciences at ASU, where she was responsible for major gift fundraising and planned giving.
Tiffany Khan, Director of Annual Giving
Tiffany Khan is responsible for securing and sustaining memberships in support of Arizona PBS. Tiffany joined the Arizona PBS team in April 2019 after more than a decade fundraising for education and healthcare organizations. In those roles, Tiffany leveraged telemarketing, email, direct mail, social media and crowdfunding channels for annual giving, pipeline development and donor engagement efforts.
Heather Kivatinos, Local Sales Manager
Heather Kivatinos is the Local Sales Manager for Corporate Underwriting at Arizona PBS. Heather leads the media sales strategy of our four TV channels as well as print and digital assets. She brings 10-plus years of advertising leadership to Arizona PBS and previously led local and national sales teams for USA Today. Heather is an Arizona native and enjoys giving back to her community; she is a proud graduate of Valley Leadership.
