The organisation says the new structure is focused on attracting and keeping young people from all backgrounds and abilities, in the sport.
The new structure will divide the marketing function from the revenue-generating commercial arm - previously combined under former marketing director Steve Curzon.
A new commercial director will shortly be recruited and will report to chief executive John Crowther, along with the current director of communications, Heidi Cohu.
Marketing will focus on the support and delivery of grass roots tennis through the LTA's tennis operations team.
Sara Acworth, the LTA's marketing manager for the past three years, has been promoted to head of marketing.
She will report to Rebecca Miskin, LTA tennis operations director, and will be responsible for the marketing strategy for key grass roots areas.
Said Acworth: “Our future success in making Great Britain a great tennis nation depends on attracting and keeping juniors in the game.
“Tennis must compete with all other junior pastimes, from computer games to other sports.”
The LTA's commercial team will now have an increased emphasis on building external partnerships, especially in the business community, with the opportunity for the new commercial director to head up the LTA's commercial, sponsorship and Tennis GB operations.
The LTA will reveal details of that appointment at a later date.
