Meet Our Team of Milwaukee Electricians

"The achievements of an organization are the results of the combined effort of each individual." - Vince Lombardi

In 1983, Lee Balthazor formed NSI Electrical Contractors, Inc. to meet the growing need for quality electrical installations performed in a safety-first environment. His collaborative, customer-centric approach employees and client relationships would become the mission of NSI Electrical Contractors Milwaukee.  Today, NSI has further developed a culture of continuous learning and a steadfast commitment to ethics and integrity. These values, along with a proven history of excellent customer satisfaction are the foundation upon which NSI Electrical Contractors Milwaukee continues to grow.

milwaukee electricianAndrew Balthazor, President

Andrew Balthazor, a Master Electrician certified by the State of Wisconsin, has worked in the electrical construction industry for more than 28 years. While serving as Vice President of Estimating and Business Development he has made time to continue his professional education by taking course work at Purdue University.  Since assuming office, he has extended NSI’s safety and professional education programs for NSI employees. As a result, the Milwaukee electricians at NSI have become highly adept at performing electrical maintenance and installations in the safest possible manner. In recent years, NSI Electrical Contractors Wisconsin has maintained an average rating of .85 for worker’s compensation experience modification, demonstrating the success of the continued training programs.

Contact Milwaukee Master Electrician Andy via email at


milwaukee electricianJacob Leitzke, Estimator/Project Manager

With over 19 years of industry experience, Mr. Leitzke has worked his way up from an apprentice to estimator/project manager. As a Master Electrician, he brings a welcome perspective Wisconsin electrical project management. His portfolio includes large-scale Milwaukee commercial electrical projects (El Rey Food Mart and TCF Banks), mid-rise community associations (Kramer Lofts in Milwaukee's 5th Ward), retail facilities (South Milwaukee Retail), and educational institutions (High-Tech Institute in Brookfield).

Jacob personifies NSI Electrical Contractors Milwaukee’s commitment to continuous learning and development.

Contact Electrical Estimator/Project Manager Jake via email at


milwaukee electricianSteve Marsicek, Estimator/Project Manager, CAD

Steve Marsicek, started his Wisconsin electrical contracting career with NSI. After graduating with honors from ITT Technical Institute in 1997, he began at NSI as a Milwaukee electrical design engineer specializing in CAD. He offers our customers the opportunity to visualize their electrical design build projects in a computerized format. Steve has estimated and managed a wide variety of projects including residential electrical construction projects (Kenosha Commons and Windsor Courts in Milwaukee), retail (Fresh Market in Brookfield), and commercial electrical projects (Grant Thornton in Milwaukee). Prior to his employment with NSI, Steve served in the Gulf War/Desert Storm as a member of the US Air Force.

Contact Electrical Estimator/Project Manager, CAD Steve via email at


Milwaukee electricain managerNick Semenske, Estimator/Project Manager/Service

Nick started his career with NSI in August of 1999. NSI indentured him in the ABC Electrical Apprenticeship Program in July 2000. When he completed this program, he received his WI Journeyman’s License. After graduating Nick was selected to be a jobsite foreman. He ran such projects as Comfort Suites Hotel, Blue Ribbon Lofts, Fairfield Marriott, Sturtevant Sports Complex, Woodman’s groceries and many others. Nick continued to excel and received his WI Master Electrician license in 2008. In the fall of 2010, Nick took on another challenge and moved into the office to be a Project Manager and Estimator. His field knowledge helped him greatly in acclimating to these new roles. Nick continues to strive and grow, as he has continued to take classes at MSOE.

Contact Electrical Estimator/Project Manger Nick via email at


Business Manager Fernanda BalthazorFernanda Balthazor, Business Manager

Fernanda is responsible for overseeing all the operations of a business. She oversees the Accounts Payable and Receivables, process all direct deposits, hiring professional and technical staff, implementing budgets and manages the accounting department.

Prior to joining NSI, Fernanda was an Assistant Manager for the Store Design and Planning Department at the Kohl’s Corporate Office for over 8 years, where she led a group of Auto Cad planners and several of the unique projects from Mervin’s acquisitions.

Fernanda holds a Bachelor degree in Architecture and Urban Planning from the University of Santa Ursula in Rio de Janeiro, Brazil. She is fluent in Portuguese and English.

Contact Fernanda via email at


Jennifer Schulz Assistant ManagerJennifer Schulz – Assistant Manager

Jennifer handles all daily operations of the business. She processes weekly payroll, answers all incoming calls to the Business, receives and processes all accounts payables and handles all the vendor maintenance. She is also responsible for contacting all our clients in regards to lien waivers. She processes all the AIA Billing to our General Contractors along with Time and Material Billing to our customers.

Prior to joining NSI, Jennifer had worked for a few companies over the last 15 years where she handled accounts payable, payroll, purchasing and customer service. She always strives to provide excellent customer service to both employees and customers.





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