Lagina was the owner and president of the commercial plumbing company Lagina Plumbing from 2001 to 2010. The company has been involved in several major construction projects in the Milwaukee area, including Bayshore Town Center, Park Lafayette, Milwaukee Public Market, the office building 875 East Wisconsin and The Modern. .
Since 2012, Lagina has been independent as the business development manager of the Lagina agency.
During her career, Lagina has also worked for Zien Mechanical Contractors, Friese Mueller Plumbing and Fire Protection Ahern.