Sea Colony Tennis Professionals

Thomas Johnston

Thomas Johnston
Director of Tennis, USPTA, PTR

Thomas is a three-time collegiate All-American and former head men's tennis coach at the University of Virginia. At UVA, Johnston established himself as one of the most innovative and successful coaches in the country. In 1997, UVA qualified for the national team tournament for the first time in the school's history. In another first, Thomas led his team to the finals of the 1998 ACC Championships and NCAA Regional Championships. Under his leadership, the team's NCAA national ranking improved from No. 95 to No. 15. Upon graduating, several of his students went on to achieve world rankings.

Before joining Sea Colony, Thomas headed an award-winning tennis program at Wintergreen Resort in Virginia for 10 years. He was also named the USTA's 2015 Delaware District Pro of the Year.

Under Thomas' guidance as Tennis Director, Sea Colony is one of the top 50 resorts in the country, according to Tennis Resorts and Tennis Magazine. In 2012 and 2016, Johnston led Sea Colony to a USTA Outstanding Facility of the Year award. A respected speaker offering seminars on the mental and strategic aspects of tennis, he has also published numerous sports-related articles. With a master's degree in sports psychology, Thomas has completed his coursework for a doctorate in sports psychology.

Thomas has two children, Robert Alexander and Julianne Marie. His wife Maureen has taught college English for the past 8 years.

Alex Justiniani is Sea Colony Tennis' head professional

Alex Justiniani
Assistant Director of Tennis, PTR

Alex is a Professional Tennis Registry (PTR) certified instructor and has achieved professional certifications in all three PTR pathways: Adult Development, Junior Development (10 & Under and 11-17) and Performance. He also holds certifications in Cardio Tennis and Wheelchair Tennis. He was named Delaware’s 2012 PTR Pro of The Year and to Tennis Industry Magazine's 2013 Top 30 Under 30 professionals in the country.

As a player, he competed in ITF and Futures Circuit in the United States, Mexico and Europe. As a junior, Justiniani trained at the world renowned Van Der Meer Tennis Academy in Hilton Head Island, SC.
Alex brings 13 years of teaching experience to the resort program, including six right here at Sea Colony.
Katie Youlios is an associate pro at Sea Colony Tennis Katie Youlios
Associate Pro
Originally from Wayne, N.J., Katie Youlios started playing tennis at the age of six. She graduated from Wayne Hills High School, where she won the county championships four consecutive years. In addition, she captained the girls’ team her senior year.
Katie graduated from Salisbury University in May 2016 with a bachelor’s degree in communication arts and a minor in athletic coaching. A four-time all-conference player, she graduated as the school’s all-time total wins leader, ending her collegiate career with the No. 4 in singles wins and No. 1 in doubles victories, with 55..
Katie started working at Sea Colony last summer and has been a valuable addition to our staff. She has more than five years of coaching experience, including Nike Tennis Camps, and currently serves as the head girls’ tennis coach for The Salisbury School in Salisbury, MD.