The Construction Industry Training Board (CITB) NI organised the SkillBuild NI event held at the Downpatrick campus of SERC.
According to Rachel Dorovatas, from CITB NI, there is a need for more young people like Rebecca, Aaron and David.
The organisation forecasts that 3,000 more construction workers will be needed in Northern Ireland by 2028.
"We have 11 trades happening in the competition, from wall and floor tiling to plastering, carpentry, joinery, a whole host of activities," she said.
"We know that the construction industry is definitely facing a skills shortage.
"We also know that there's an ageing workforce in some of those sectors.
"There are so many great opportunities and great roles from the trades," she added.
Getting more women into construction is also a priority and Rebecca Gavigan certainly has no regrets about choosing tiling as a career.
"I'm planning to hopefully work for myself, maybe start my own company at some point," she said.
"Tiling is definitely an art form and it takes a lot of years' practice and craft to really hone it."
