The professionals who would most likely use heavy equipment and specialized tools in their line of work are Repair Workers and Carpenters.
Repair workers often use heavy machinery and tools for various types of repairs, while carpenters typically use specialized tools for construction and building projects. Additionally, both professions involve hands-on work that often requires the use of heavy equipment.
While other listed professions might also use tools, the specific focus on heavy equipment and specialized tools aligns best with the work done by repair workers and carpenters.