People are posting some interesting links in other places. Here's one where he got a 5-year Honor Roll mention from PCM Construction. Looks like he was a painter.
http://www.pcmservices.com/who-we-are/employee-honor-roll/
Also here's his job resume from an online job posting site:
STEFFON WINT (240)***-**** **** Riverdale RD #*** Lanham Maryland 20706
Qualification Summary
1. Dedicated and responsible worker for 10+ years with different tastes.
2. Excellent Knowledge on MS Word, Excel, Internet and E-mail.
3. Work well and calmly in stressful, Changing situations.
4. Organized, detail oriented and thorough
Related Work Experience
P.C.M Construction Co.- Beltsville, MD Superintendent Perform a wide range of skills including customer service, supervising a team of workers, completing time sheet, preparing work order, handling phone inquires, carpentry, painting, plumbing, installing receptacles, and more.
These company names do not match the signs outside the house that were posted earlier (post #631). But it is obvious work was being done there.