Antoniewicz makes his way to Hartsville after spending the last three years as the assistant mens soccer coach at Truett McConnell University, in which he assisted in all aspects of the day-to-day operations. During his time at Truett McConnell, Antoniewicz helped guide the Bears to a 32-20-3 record. Antoniewicz helped lead the Bears to their first ever Appalachian Athletic Conference Championship and first ever NAIA tournament appearance in 2017 after finishing the season with a record of 16-4-2. His duties as assistant soccer coach at Truett McConnell include being the head of recruiting, compiling scouting reports, running training sessions, field maintenance, and player management on and off the field. Antoniewicz also aided international students with their student visa process and the NAIA eligibility process, while also handling off campus evaluations, campus visits, and social media development projects. Along with his work at Truett McConnell, Antoniewicz serves as an academy coach for the 2018 MLS Cup Champions Atlanta United and the head coach of the Lanier Soccer Academy. He has coached some of the top soccer prospects in Georgia during his time in the Atlanta United Academy, leading training sessions throughout the academy system. He also holds a USSF Level D License. Antoniewicz graduated from Truett McConnell in 2016 with a Bachelor of Science in Business with a concentration in Sports Management and is currently pursuing Master of Business Administration. He is a native of Kirkcaldy, Scotland and is the husband of Brianna Antoniewicz.