History
A journey of growth, innovation, and industry leadership over the past 30+ years.
1995
Founded by Patrick McMillan Jr. as a division of McMillan Electric, laying the foundation for decades of industry expertise.
2008
MDC Low Voltage incorporated independently, expanding services in telecommunications, audio visual, and security systems.
2025
Merged with McMillan Security Systems, strengthening capabilities in security integration and customer support.
Who We Are Today
MDC is a leading IBEW Sound and Communication contractor specializing in the design, installation, and service of telecommunications, audio visual, and security systems across California and throughout the U.S.
Our Expertise
With over 120 full-time technicians and certified professionals, including RCDDs, CTS-Is, CTS-Ds, and manufacturer-certified specialists, we deliver end-to-end solutions from design through installation, service, and maintenance.
Industries We Served
We bring deep experience across K-12 and higher education, healthcare, life sciences, commercial tenant improvements, technology campuses, residential developments, and public works projects.
What Sets Us Apart
Our commitment to fast, consistent communication, attention to detail, and creative problem-solving allows us to deliver high-quality results on time, no matter the size or complexity of the project.