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Smithsonian Early Enrichment Center


Who's Who at SEEC

Administration Team

Katie Heimsath, Director of Operations

Since joining SEEC in 2015, Katie has found a passion for using the community, including the natural world, to foster curiosity and agency in young learners. Katie holds a B.A. in Anthropology at Texas State University and an A.S. in Early Childhood Education from Ashworth College. Katie has experience teaching young infants through kindergarten age children. She is committed to supporting the SEEC educators and caregivers in their journey to help cultivate empathy, responsibility, and respect for ourselves and the rest of the global community. Kate enjoys reading, cooking, and baking, camping, and spending time with her friends and family. Katie currently support SEEC remotely from Seattle, WA where she lives with her husband and 2 children. SEEC remotely from Seattle, WA where she lives with her husband and 2 children.

Kia Holt-Williams, Director of Infant & Twos Programs

Kia is a native of Baltimore, Maryland who has worked in education for over 20 years. Working as a classroom teacher, program director, and school director she has always been led by a deep-seated respect for children. Kia graduated from the Baltimore School for the Arts, has a BA in International Relations from Goucher College, and an Infant and Toddler Montessori Certification. She and her husband Sean are proud parents of Maasai, Marley, and Selah. The family also recently welcomed a puppy, Billie Holiday. She loves reading, yoga and spending time outdoors.

Tiana Mapp, Director of Kindergarten & Toddler Programs

Tiana joined SEEC in 2022 and is a strong advocate and pioneer in the field of Early Childhood Education. Containing a genuine passion for the young children she encounters and her optimism for all they wish to discover. She concluded her collegiate studies in the Fall of 2016, receiving her bachelor’s degree in Birth-Kindergarten Education from Shaw University in Raleigh, NC. Prior to graduating she dove into the field of Early Childhood Education, working as Lead Preschool Teacher. Tiana soon relocated to the state of Maryland in 2019 entering a similar role as a Pre-K Lead Teacher, but was invited to take on a joint role, as a Teacher Mentor. In her most recent position, she supported programs as a Curriculum Coordinator, observing and assessing faculty implementations in the classroom. Tiana actively works in her community through her sorority but also through personal endeavors within her advocacy group. She currently resides in the state of Maryland, right outside of D.C with her dog, Chance. Tiana enjoys leading an intentional lifestyle and hanging out with friends in the city.

Meredith McMahon, Executive Director

Meredith has been working in the early education field for 20 years and has worked as both a classroom teacher and a program director. She earned her BA in history from the University of Pennsylvania and her MA in early childhood education from the University of Phoenix. Meredith has been a part of SEEC since 2004 and has been Deputy Director of Operations since 2008. She grew up in Scranton, PA, lived and worked in Philadelphia, PA for 11 years and moved to DC in 2002. Meredith is a dedicated Phillies fan who’s also a runner, avid reader and collector of toys that can be found throughout her office. She lives in the District with her husband, Jeff, and their 2 crazy cats.

Melody Passemante Powell, Director of the Office of Engagement

Melody is a Northern Virginia Native who has been with SEEC since 2011. She earned her B.S. in Early Childhood Education from James Madison University and holds a MEd in Education Management as well. Melody has worked extensively with young children in a variety of settings, from infants through 3rd grade and enjoys seeing children make connections to both the outside world as well as their own identities. She is passionate about creating partnerships with families, educators, and museum specialists around the globe to share SEEC’s approach and collaborate regarding best practices as well as new and innovative ways of connecting young audiences with museums. She is dedicated to people centered and equity-based support to provide high quality educational experiences for families and children. Melody is also deeply committed to social justice, equity, and continuous self-reflection. She is a proud mom of 2 curious children and in her off hours she enjoys spending time with family and friends.

Juliana Venegas, Director of Preschool Programs

Juliana joined the SEEC community in 2019. She earned her Associates in Early Childhood Education, and later, an MAT in Museum Education from The George Washington University. Juliana has experience in creating and delivering museum programs for children and families and fostering positive classroom environments for young learners. Juliana enjoys using objects to creatively present children with new ideas and support their language and literacy development. She joined the Administrative Team in 2022 and enjoys working with faculty and families to make their time at SEEC both enjoyable and successful. When not at work, Juliana enjoys spending time with her partner, Brent, and their puppy, Garbanzo. Juliana equally loves settling in for a good book or a funny movie. Often, you can find her on the weekend train traveling back to Connecticut to visit her family and hometown friends.