This is the 5090th most frequent Polish word.
profesjonalnych
"Professional" (plural, genitive or accusative form in Polish).
The word "profesjonalnych" here is used as an adjective to describe the trainings, implying their high standard and relevance.
Uczestniczyłem w wielu profesjonalnych szkoleniach w firmie.
I participated in many professional trainings in the company.
The word "profesjonalnych" serves as an adjective emphasizing that the tools mentioned must be of professional grade or quality to be effective.
Nowoczesne technologie wymagają stosowania profesjonalnych narzędzi.
Modern technologies require the use of professional tools.
"Profesjonalnych" is used to detail that these projects are executed with expertise and are of a superior standard.