Endorsements

His contracting and consulting were endorsed by these organizations:

• The American Homeowners' Association
• Home Connections, Inc.
• BG&E's Keeping Current
• Washingtonian Magazine
• Washington Consumer Checkbook

Consulting and Teaching

• David's provided lessons or seminars over the years to a variety of individual customers and groups.
• He offers one-on-one instruction as he evaluates or inspects electrical work; the reports have always shown a lot more than "pass/fail."
• David is known for explaining his work to customers, and was respected for this even as a contractor—beforehand, during, and afterwards, before leaving a job.
• Finally, David's services include consultation regarding conscientious customers's work (within careful limits—he can't take responsibility for installation or repair not performed under his eye.)

He's served as a consultant on electrical topics to a wide variety of clients:

• book and pamphlet publishers
• periodicals including
  • Readers Digest
  • Popular Mechanics
  • Fine Homebuilding
  • The Wall Street Journal
• staff at the National Electrical Contracting Foundation;
• trial lawyers;
• inventors; and
• The Handyman Club of America.
He's assisted people referred by various groups:
• NECA, the union contractors' organization
• IEC, a non-union contractors' organization
• NEMA, the electrical manufacturers' association

One reason a variety of groups turn to David as a consultant is that he's a trained and experienced teacher, specializing in adult electrical education. David received graduate training in teaching at Lehigh, and has taught at levels ranging from pre-school to university.
The electrical teaching has taken many forms.

• IAEI certified him as an electrical instructor, qualified to teach seminars that provided Continuing Education to electrical inspectors, designers, and electricians. He did so periodically for decades;
• Other times he took responsibility to arrange for other instructors to provide continuing education seminars.
• The American Society of Home Inspectors relied on him for Continuing Education on electrical safety inspection three times between 2012 and 2024, twice in the D.C. metropolitan area and once in New York.