Mojecki was known as a person with a kind heart, who did a lot for the other Polish emigrants who settled on Staten Island. He had several businesses like butchering, mercantile and home building. He became well respected for building St. Adelbert's Roman Catholic Church.
Mojecki was known for his compassionate nature, often assisting other Polish emigrants who had settled in Staten Island. He operated several businesses including meat processing, retail, and home construction. His most significant contribution was building St. Adelbert's Roman Catholic Church, which greatly enhanced his reputation.