In , Maksim and Sasha opened a youth-oriented dance studio in New Jersey, and Valentin was one of the students. In , Valentin and partner Diana Olonetskaya, 15, became the first American dance team to win a world junior championship title. Previously one was in Sherman Oaks, California , but has since changed ownership. The couples performed two numbers. He starred in a dance off against his brother, Maksim Chmerkovskiy. They were eliminated second, finishing in 11th place.
In season 14 , Chmerkovskiy was partnered with comedian and talk show host Sherri Shepherd. On Rock Week Week 4 of Dancing with the Stars, they were the third couple to be eliminated, finishing in 10th place. Chmerkovskiy danced as a professional partner in season 15 with season 1 winner, Kelly Monaco. For season 17 , he paired with film and television actress Elizabeth Berkley Lauren. Despite receiving high scores, they were eliminated on week 9, finishing in sixth place.
For season 18 , he paired with actress and author Danica McKellar. They were eliminated on Week 8 and ended in sixth place. They made it to the finals and finished in third place.
On May 19, , Willis and Chmerkovskiy were crowned the winners marking Chmerkovskiy's first win. The couple made it to the finals but ultimately ended in third place. For season 23 , he was partnered with Olympic artistic gymnast Laurie Hernandez.
On November 22, Hernandez and Chmerkovskiy won the title, giving Chmerkovskiy his 2nd mirrorball. For season 24 , he was partnered with Fifth Harmony singer Normani Kordei.
For season 25 , he was partnered with former Paralympic swimmer Victoria Arlen. They made it to the semi-finals in week 9, but were then eliminated, finishing in fifth place.