STAFF
Matthew Robertson, Artistic Director
Matthew Robertson, praised for his “sensitive and nuanced” conducting, is acclaimed as the driving force behind the all-star professional choir, The Thirteen, and is hailed as a leader in the field. As Founder and Artistic Director of The Thirteen, he has conducted the ensemble throughout the United States and on multiple recordings.
Robertson’s 2020-2021 season promises to be unlike any before it, with numerous live-streamed performances, including performances of Schütz’s Musikalisches Exequien, Handel’s Messiah, a staged performance of J.S. Bach’s St. John Passion, Monteverdi’s The “Lost” Mass, and more.
Angela Marroy Boerger, Managing Director
Angela Marroy Boerger is an arts administrator, musicologist, and violinist who has spent her career working to build conversations and communities around artmaking—the result of her deeply-held belief that access to an arts-rich life is a fundamental civil right. Angela joins The Thirteen from Arts Every Day in Baltimore, where she was Director of School Programs and Learning and worked with Baltimore City Public Schools to ensure equitable access to the arts for all students in the district. While at Arts Every Day, Angela founded the Baltimore Arts Integration Project, a $2.9 million US Department of Education-funded initiative.
Prior to her work in Baltimore, Angela was the Education Manager at the Metropolitan Opera, where she led the education curriculum and programming for the Met’s HD Live in Schools, an opera education and access program in 38 states across the country for over 16,000 students each year. Angela has also served as Director of Education at Westport Country Playhouse, as a Music Writer for McGraw Hill Education, and as Managing Editor of Bare Opera in New York.
Trained from youth as a violinist, Angela discovered historically-informed performance practice as a violin major at the Shepherd School of Music at Rice University. She holds bachelor’s and master’s degrees from Rice in musicology and medieval studies, and pursued PhD studies in music history at Yale University, writing on Viennese opera at the end of the eighteenth century. Her wide-ranging research interests have included classical and contemporary opera and Lieder to American swing dance music and Duke Ellington.
Angela lives in Maryland with her husband Tim and children Sophie Magdalena and Thaddaeus James, who are aspiring graphic novelists and paleontologists, respectively. In her free time, you can find her on sunny days working in her gardens, and in inclement weather, pursuing a never-ending list of restoration projects in her historic home.
Abigail Slate, Artistic Operations Coordinator
Abigail Slate is an arts administrator and production professional whose work centers on supporting artists and organizations through thoughtful operations, logistics, and collaboration.
Abigail brings several years of experience in performing arts administration, production coordination, and venue operations. Prior to joining The Thirteen, she held roles at the Thrasher-Horne Center for the Arts, where she supported programming, marketing, guest services, and large-scale live events, working closely with artists, technicians, and visiting companies. Her professional background also includes collaborating with contractors and small businesses, managing schedules, communications, and operational details across fast-paced performance environments.
She holds a Master’s degree in Entertainment Business, and has built her career around live performance logistics, artist relations, and detail-driven project management. Known for her adaptability, calm under pressure, and collaborative approach, Abigail is drawn to organizations that value both artistic excellence and care for the people who make performances possible.
Originally from Florida, Abigail is new to Arlington, Virginia, and enjoys exploring the region’s arts community, hiking local trails, and spending time with her husband and their two dogs.