Business Details
43 Years
experience
Emergency
services
Trusted Electrical Contractors in Milwaukee, WI
NSI Electrical Contractors has been a trusted name in the electrical contracting industry for over four decades. Founded in 1983 by Lee and Kathleen Balthazor, our family-owned business has grown from a small local operation to a leading provider of electrical solutions for commercial, industrial, and residential properties across Southeastern Wisconsin. Our commitment to quality, safety, and innovation has earned us a reputation as one of the premier electrical contractors in the region. With a team of highly skilled master electricians and project managers, we deliver customer-centric solutions tailored to meet the unique needs of each client. Our expertise spans new construction, maintenance, design-build projects, and 24/7 emergency services, supported by advanced CAD technology for industrial electrical systems.We prioritize continuous technical training and safety programs, ensuring our team remains at the forefront of industry advancements. Our long-standing relationships with repeat clients and business partners reflect our dedication to ethical practices, integrity, and exceptional service. From large-scale industrial installations to residential wiring, we combine decades of experience with cutting-edge solutions to meet the evolving demands of our clients. Our leadership team, including President Andrew Balthazor with over 35 years of experience, continues to drive our mission of excellence. Whether serving Milwaukee, Madison, or surrounding areas, NSI Electrical Contractors remains rooted in the values of a family business while embracing innovation to power progress for our clients.
Services
Commercial Electrical
Industrial Installations
Residential Wiring
24/7 Emergency Service
Design-Build Projects
Details
- Year established: 1983
Highlights and features
- We offer 40+ years of specialized expertise in electrical contracting across Wisconsin.
- Our team includes Master Electricians with advanced CAD design capabilities.
- We provide 24/7 emergency electrical services for urgent client needs.
- Our safety training programs maintain a 0.91 workers' compensation experience modification rate.
- We combine family-owned values with cutting-edge technology for innovative solutions.
What people say
Amazing job
Extra efforts
Transition a success
Highly skilled team
Reliable service
Services
Commercial Electrical
NSI Electrical Contractors delivers comprehensive commercial electrical solutions, including installations, maintenance, and upgrades for retail stores, office buildings, and hospitality venues. Our focus on safety and efficiency ensures reliable power systems that meet evolving business needs. With decades of experience in Southeastern Wisconsin, we handle projects from small repairs to large-scale construction.
Industrial Installations
Our industrial electrical services feature CAD-designed systems for manufacturing facilities and complex industrial operations. We specialize in high-capacity installations, control systems, and emergency power solutions tailored to demanding industrial environments. With 40+ years of expertise, NSI ensures compliance with safety standards while optimizing operational efficiency for Wisconsin manufacturers.
Residential Wiring
NSI provides residential electrical services for multi-family housing, senior living facilities, and condominiums. Our capabilities include new construction wiring, service upgrades, and lighting installations that enhance safety and functionality. Backed by decades of local experience, we deliver code-compliant solutions for property managers and homeowners associations across Southeastern Wisconsin.
24/7 Emergency Service
We offer round-the-clock emergency electrical services to address critical power failures, safety hazards, and operational disruptions. Our rapid response team handles urgent repairs for commercial, industrial, and residential clients throughout Wisconsin. With decades of experience managing emergency situations, NSI ensures minimal downtime and restored functionality as quickly as possible.
Design-Build Projects
NSI's design-build electrical services combine CAD engineering with project management expertise for seamless implementation. We collaborate with clients from concept through completion, optimizing electrical systems for efficiency and scalability. Our Wisconsin-based team has executed hundreds of design-build projects for commercial, industrial, and residential developments over four decades.
People
Andrew Balthazor
President
Andrew Balthazor, a Wisconsin-certified Master Electrician with 35+ years of experience, leads NSI Electrical Contractors. He expanded safety programs and professional education initiatives, achieving a 0.91 workers' compensation experience modification rate. Andrew continues to drive NSI's growth while maintaining family business values.
Jacob Leitzke
Vice President
Jacob Leitzke brings 25+ years of electrical contracting experience to NSI. Starting as an apprentice, he advanced through all roles to become Vice President. He manages large-scale commercial and retail projects while emphasizing client relationships and continuous improvement in electrical services.
Steve Marsicek
CAD Technician
Steve Marsicek has specialized in electrical CAD design since 1998. With expertise in visualizing complex projects, he provides clients with detailed electrical drawings. His 25+ year career at NSI includes managing diverse projects from senior living facilities to industrial complexes across Wisconsin.
Nick Semenske
Project Manager
Nick Semenske transitioned from field foreman to project manager after earning his Master Electrician license. With 20+ years at NSI, he oversees complex projects like hotels and grocery stores. His field experience enhances his ability to manage electrical installations efficiently.
Kyle Emrich
Service Manager
Kyle Emrich progressed from apprentice to Master Electrician and service manager at NSI. With 15+ years of experience, he manages residential and commercial projects while implementing continued training programs. His career reflects NSI's commitment to internal advancement and technical excellence.
Questions
What types of electrical services do you offer?
We provide commercial, industrial, and residential electrical services including installations, maintenance, 24/7 emergency repairs, and CAD-designed industrial systems across Southeastern Wisconsin.
Do you offer 24/7 emergency electrical services?
Yes, NSI Electrical Contractors provides 24/7 emergency services for urgent electrical issues affecting businesses or residential properties in Wisconsin.
Which areas do you serve?
We primarily serve Milwaukee, Madison, and surrounding areas in Southeastern Wisconsin for all electrical contracting needs.
How experienced is your team?
Our team includes Master Electricians with over 35 years of experience and project managers with 20+ years in the industry, supported by continuous technical training programs.
Can you handle large-scale industrial projects?
Yes, our CAD-engineered systems and experienced team manage complex industrial electrical installations and maintenance for manufacturing facilities across Wisconsin.
