Angelo was a union driller in the Dock Building Union for 28 years, working in New York City and the surrounding boroughs. He was a union foreman for 15 years and a general foreman for 10 years. Both positions entailed running a crew of 10-15 employees, laying out jobs, managing drilling operations, etc. Throughout his time in the union, he gained valuable knowledge in regards to helical pile installation, wood pile installation, and all facets of foundation drillings. He become the owner/field supervisor of Slacke Test Boring Inc. in 2015 where he oversees all jobs. Angelo spends significant time on each job, ensuring that boring locations are laid out, confirming access to all boring locations and creating access if needed, and coordinating scheduling with all necessary parties.