David Sun, Director/Founder, began SundanceX to explore original classically based choreography. He studied with the late Richard Thomas and Barbara Fallis at the New York School of Ballet after attending Boston Conservatory of Music. He performed as a dancer with the Houston Grand Opera, and danced with numerous regional groups in New York and New England. He has taught ballet extensively throughout the Northeast region, including at Boston Ballet under Bruce Marks' and AnnMarie Holmes' administration, Boston College, Boston University, Harvard University, and local studios in Massachusetts and New Hampshire including now at Edra Toth’s Northeastern Ballet Theatre. He also works as a photographer with a focus on dance, after a brief career in the fashion industry. 

Aiva Berrigan is a member of Manassas Ballet Theatre in VA. She was formerly a dancer with Virginia Ballet Theatre for two years, a trainee with Cleveland Ballet (2023-24), and a company dancer and student with Southern NH Dance Theater for two years including studying with David Sun. She is a graduate of Boston Ballet's Pre-Professional Program. Regional Dance America named her their 2022 Senior Classical Outstanding Soloist of the Northeast region. She trained at many summer intensives including American Ballet Theatre NYC, Boston Ballet, San Francisco Ballet, School of American Ballet, and Philadelphia Ballet.

Aiva performed with SundanceX in Sun’s: Solaris in 2021, and his Bach Cello Suite 4 in 2022, both at the Jose Mateo's Ballet Theatre of Boston's Dance for the World Community Festival. In August 2024, she performed in Wings of Water at Edra Toth's Studio Showcase at Northeastern Ballet Theatre, also at the Lila Festival 2024 & 2025 in Rochester NH. She performed in the premiere of The Wild Wind Weeps at José Mateo’s Ballet Theatre of Boston’s Dance for the World Community Festival on June 6, 2026, and again at the Lila Dance Festival, Rochester NH in August 2026.

Hayley Donahue is a professional ballet dancer and apprentice with Ballet RI, known for her versatility, artistry, and strong classical foundation. She has trained with prestigious institutions including Pacific Northwest Ballet, Boston Ballet School, San Francisco Ballet School, and The Washington School of Ballet, and for three formative years with Carlos Molina and Erica Cornejo at their Integrarte school in Boston MA. Hayley has performed in a wide range of classical and contemporary works, including Swan Lake, The Nutcracker, Don Quixote, Coppélia, Giselle, La Sylphide, and A Midsummer Night’s Dream.

Her repertoire includes corps de ballet, soloist, and featured character roles such as Seguidilla in Don Quixote, Ballerina Doll in The Nutcracker, and the Sylph in La Sylphide. She has worked with acclaimed directors and teachers including Kathleen Breen Combes, Peter Boal, Erica Cornejo, Carlos Molina, and Yury Yanowsky.

Hayley worked in a project with SUNDANCEX in the Summer of 2026, performing in David Sun’s The Wild Wind Weeps at the Lila Dance Festival, Rochester NH.

Olivia Kaczmarzyk, a native of Providence, RI, began her ballet training at Ballet RI (formerly Festival Ballet Providence) at the age of six. By 14, she was performing alongside the company corps de ballet in productions of The Nutcracker and The Sleeping Beauty before officially joining the company at the age of 17. Olivia has performed many soloist roles in ballets including Viktor Plotnikov’s Coma and The Widow’s Broom, Christopher Wheeldon’s The American, as well as the iconic works of George Balanchine including  Allegro Brillante, Rubies, and Serenade. In 2021, Olivia joined North Atlantic Ballet, where she danced a wide range of principal roles including the title roles in Romeo and Juliet and The Firebird. She performed in José Mateo’s 2025 Nutcracker, dancing the roles of Dream Fairy, Doll, Snow, and Russian soloist.

In the summer of 2026, Olivia worked in a project with SUNDANCEX, performing in David Sun’s The Wild Wind Weeps at the Lila Dance Festival, Rochester NH.

Karina Thendean is currently a sophomore at Northeastern University, majoring in Bioengineering with a minor in Philosophy. She is originally from the Bay Area in California, and for most of her youth, she trained at Contra Costa Ballet until her junior year, when she joined Boston Ballet’s Pre-Professional Division at Walnut Hill. In her two years at Boston Ballet, she was able to perform alongside students and the company in productions such as Mikko Nissinen’s “The Nutcracker”, “Coppelia”, “ Le Corsaire”, and various other student-run pieces. After she graduated, she took a gap year to dance in Pittsburgh Ballet Theatre’s Graduate Program, where she performed in Terrence Orr’s “The Nutcracker”, “Serenade”, and other student choreography, while also getting the chance to choreograph herself. Karina has attended many summer intensives at American Ballet Theatre, School of American Ballet, Dutch National Ballet, and Royal Danish Ballet. Outside of ballet, she enjoys exploring the city, going to yoga classes, and attempting new recipes.

In the summer of 2026, Karina worked in a project with SUNDANCEX, performing in David Sun’s The Wild Wind Weeps at the Lila Dance Festival, Rochester NH.

Soojin Kang, is originally from South Korea. She began performing for SundanceX in 2014, playing Alban Berg's Piano Sonata, Op. 1 for In Blue Orchids, and J. S.  Bach's Partita 2 for Bach to Bach.

She is now an Eastman School of Music assistant professor of collaborative piano, after earning a doctoral degree from Michigan State University.

She won her first piano competition at age 8, sparking a passionate interest in studying music. She graduated from Kyung Nam Arts High School as a top honors student, performing Beethoven's Piano Concerto No.2 with the Kyung Nam Arts High School’s Orchestra, in her junior year, the first student to perform the work.

Soojin received an invitation to then perform with the Jinju Philharmonic Orchestra. She received her undergraduate degree from Hanyang University, where her teachers included Hyungkyu-Kim, and studied with Alexander Korsantia and Daniel Epstein when she came to the States. 

She received a Masters of Music degree at The Boston Conservatory after studying with Jungja-Kim. Her honors include: 1st Prize at the Boston Conservatory Honors Competition 2013; Grand Prix in Gaecheon Arts Festival, the Jinhae Gunhang Festival, and the Kimhae Music Association’s Competition; 1st Prize in Baejae University's Competition, the Haneol Competition, and the Masan Music Association’s Competition; 2nd Prize at the Wooin Art Hall Competition; 3rd Prize at West Virginia Competition 2014; 2nd prize at the Daesin University competition, Changsin University competition, and Wooin Art Hall Competition.

Molly currently dances with the Chicago Repertory Ballet. She is originally from Iowa.

Molly joined SundanceX during the summer of 2015, and performed in David Sun’s Images, Torsades des Pointes, Etudes, Tango de Caprice, Caprice, and Passagio Serenata.

She received her BFA in 2016 from the University of Cincinnati College Conservatory of Music under Director Jiang Qi, after an independent study period. Previously she was at Interlochen Arts Academy, and North Carolina School of the Arts. Molly began her training at Illinois Ballet Theater under the direction of Susan Snider. At 16 she attended The University of North Carolina School of the Arts under Dean Ethan Stiefel and Interlochen Arts Academy under Director Cameron Basden.

In her senior year she moved to Boston as a trainee for BoSoma Dance Company, and upon graduating, was promoted to company dancer by director Katherine Hooper. While in Boston, McGivern was also a company dancer for Tony Williams Dance Company (City Ballet Boston) under Tony Williams and SundanceX under David Sun. Additionally she taught for Tony Williams Dance Center and Boston College. In the summer of 2018 McGivern returned to the MidWest - landing in Chicago. She performed with Joel Hall Dancers under Jacki Sinclair and Esoteric Dance Project under Brenna and Christopher Tucker before joining Chicago Repertory Ballet.

Emily McGuire, originally from Pennsylvania, graduated from the Boston Conservatory at Berklee in 2018, with a Bachelor of Fine Arts in Contemporary Dance Performance, with an emphasis in Ballet.

Emily joined SundanceX in the fall of 2016 and performed in David Sun’s Tango de Caprice, Caprice, and Passagio Serenata.

Emily received her early dance education from Contempro Dance Theatre studying classical and contemporary techniques under Jennifer Lentz and Autumn Dziegrenuk. She studied with John White and Margarita de Saa of Pennsylvania Academy of Ballet; and with Bojan Spassoff, Stephanie Wolf Spassoff of The Rock School.

Emily is currently on faculty at both The Los Angeles Ballet Academy and The School of Dance and Music. She is also performing as a company member of Los Angeles Choreographers and Dancers under director Louise Reichlin performing across the country from The San Pedro Festival of the Arts to Jazz at Lincoln Center. She has recently joined international dance company Sahlala Dancers under director Jill Collins.

Taryn is from New Hampshire, where she received her ballet training at the Londonderry Dance Academy under Barbara Mullen. She attended intensives at the American Academy of Ballet, Yorkshire Seminar, & Central Pennsylvania Youth Ballet. She was also a recipient of the Pittsburgh Ballet Guild scholarship. She graduated with a Bachelor of Arts from Point Park University's Conservatory of Performing Arts in Pittsburgh, PA, and a M. A. in Movement and Dance Therapy from Lesley University in Cambridge MA.

Taryn joined SundanceX in 2013, and has performed in David Sun’s Meditation, Solscape, Viatore, Bach to Bach, Bach to Bach II, In Blue Orchids, Elephant Walk, Images, Torsades des Pointes, Etudes, Tango de Caprice, Caprice, and Passagio Serenata, most recently at the 2019 Dance for the World Festival by José Mateo’s Ballet Theatre in June, and in Integrarte’s 2019 Winter Showcase II in March 2019. Excerpts of the work were performed in City Ballet Boston’s fundraisers in March and April 2019.

Taryn has performed various classical & contemporary works. She has performed works by Gianni DiMarco and Tony Williams, and performed in Tony Williams' Urban Nutcracker in 2014, 2016, 2017, and 2018. She joined his City Ballet of Boston in its inaugural season Sept. 2018, and performed with it through the spring of 2019.

She was a faculty member of Koltun Ballet Boston for two years, amongst other local studios. For the past 17 years she has taught yoga in the States, Kenya, Tanzania, & Germany. She now resides in Berlin, Germany, where she is performing and teaching.