Hartwell Engineering. HEI supplies complete services and solutions for the design and integration of electrical, mechanical, and instrumentation/control projects. Our staff of experienced engineers, technicians, inspectors, and designers supplies the expertise and necessary resources to suit all of your project needs. The strength of HEI is defined by our employees.

Contact Details

  City Crofton , MD
  Zip Code 21114
  Address 2141 Priest Brdge Drive # 8
  Phone Number (301) 858-9281