The people
who sign the report.
Seven names on the masthead, three of whom hold the ASSE 5110 backflow-tester credential and write their signature on the form that gets filed. Each is named below with their credentials, their license number, the years they've held them, and a phone extension.
Roster
| Tester | Role | Credentials | License | Since | Ext. |
|---|---|---|---|---|---|
| Aurelio Ferraro | Founder · Master plumber · Lead tester | ASSE 5110 · 5130 · 5150 · WI MP | WI DSPS MPRS-9415-W | 2002 (MP) / 2008 (5110) | x101 |
| Maeve Okafor | Owner · Tester · Office liaison | ASSE 5110 · journeyman plumber | WI 5110 #2021-18887 | 2018 | x102 |
| Leland Stoltzfus | Owner · Tester · Fire-service specialist | ASSE 5110 · 5130 · NICET II fire | WI 5110 #2019-11240 | 2013 | x103 |
| Riley Donnelly | Apprentice (Yr 3 of 4) · MATC plumbing | WI plumber apprentice | WI Apprentice #APP-22-3201 | 2023 | x104 |
| Vera Sanchez | Apprentice (Yr 2 of 4) · MATC plumbing | WI plumber apprentice | WI Apprentice #APP-24-1099 | 2024 | x105 |
| Tomás Lasalle | Office manager · MWW filing | — | — | 2021 | x100 |
| Marisol "Sol" Hewitt | Field assistant · scheduling | — | — | 2024 | x106 |
A high-hazard assembly's annual report passes through at least two of the three testers before it ships — the testing tester signs, the office manager validates the form fields, and one of the partners reads any failure note. Apprentices observe and assist; they do not sign reports until they hold the 5110.
Coverage
Our service area is bounded north by Capitol Drive (we cross north for fire-line work in Whitefish Bay, Brown Deer, Bayside, Fox Point, Mequon), south by College Avenue, west by Highway 100 (we cross for fire service in Wauwatosa, West Allis, New Berlin, Brookfield), and east by Lake Michigan. We do not work outside Milwaukee, Ozaukee, and Waukesha counties.
Each tester covers a primary district. Ferraro takes the city core (downtown, Walker's Point, Third Ward, Historic Mitchell Street, Riverwest); Okafor takes the south side and Bay View; Stoltzfus takes North Shore and the western suburbs plus all fire-service work. Cross-coverage during vacation, illness, or peak season is automatic.