About Us
Who We Are
MJD Systems was established to serve the Central Pennsylvania community with a high demand for commercial and new construction electrical, plumbing, and HVAC services.
Our team of passionate and experienced technicians takes on every job, big or small. With over 120 years of combined industry experience, we are proud to offer our specialists’ skills at an affordable price.
Our Services
What We Do
HVAC
Experts in HVAC Commercial System Installations
- Rooftop Units
- Electric Heat Pump Split Systems
- Central Air Conditioning Units
- Oil / Gas Furnaces
- Oil / Gas Boilers
- GeoThermal
Plumbing
Your commercial project is not too complex for us to handle. Let’s work together.
- Drain Pipes
- Faucets / Fixtures
- Piping Installation
- Water Heaters
- Toilets / Urinals
- And more…
Electrical
We are experts in large scale electrical system design and installations.
- Restaurants
- Retail – Shopping Centers, Malls etc
- Office Space & Business Centers
- Showrooms & Service Facilities
- Theaters
- New Construction
What makes Us Unique
- Commercial Large Scale Project Experts
- 30+ Years Experience
- 5-Star Rating
- On-Site Project Management
- Experts in Electrical, Plumbing, and HVAC
- Competitive Quotes