Field work

The marks we leave behind.

Real jobs, photographed as we left them — and the paper that says we were trained by the people who build the radar.

Parking structure

Shear walls & columns, mapped for repair

A multi-level garage with concrete distress at the panel tops. Reinforcement traced and marked face by face, so repair work starts knowing exactly where the steel is.

End of a concrete shear wall in a parking garage, gridded in blue and red layout lines, with two GSSI FLEX NX radar units and a level on the floor at its base — Wall end laid out — vertical bars in blue, horizontal lines in red, the FLEX NX units that traced them at the base.

Close view of a marked column face in a parking garage showing bar lines and X marks, with spalled concrete exposing aggregate at the top corner — Column face up close. X marks call out individual picks; the spalled corner above is why the structure was being mapped.

Long concrete shear wall in a parking garage marked over its full height, radar units on the floor, parked cars beyond — Full-height layout down the length of a shear wall.

Free-standing concrete column gridded on all visible faces, with scanning kit and cases spread on the deck behind it — Columns get every face, not just the convenient one.

Marked wall panel in a parking garage with a diagonal crack running from its top corner — Layout carried through a cracked panel — the marks work around what the concrete is already telling you.

Parking garage bay with a cleaned white wall ready for scanning and cases of equipment staged on the floor — Staged and ready: one bay at a time, cars still moving through the rest.

Credentials

Trained by the people who build the radar.

OSHA card issued to Connor Stewart acknowledging successful completion of 30-hour Construction Safety and Health training, dated June 24, 2022

OSHA 30 — Construction Safety and Health

Occupational Safety and Health Administration · Issued June 24, 2022

The 30-hour construction safety card general contractors ask for before anyone is badged onto the job.

GSSI Academy certificate for Connor Stewart: training course in the theory and practice of applying subsurface interface radar, FLEX NX, dated July 21, 2026

GSSI Academy — FLEX NX

Geophysical Survey Systems, Inc. · July 21, 2026

Factory training on the radar we run every day: the theory and practice of applying subsurface interface radar in engineering and geophysical investigations, on the FLEX NX platform.

GSSI Academy certificate for Connor Stewart: training course in the theory and practice of applying subsurface interface radar, UtilityScan Pro SIR 4000, dated September 9 to 10, 2026

GSSI Academy — UtilityScan Pro · SIR 4000

Geophysical Survey Systems, Inc. · September 9–10, 2026

Factory training on GSSI's utility-locating platform — the groundwork for the private utility locating service launching this fall.

A copy of any certificate on this page goes out the same day you ask for it.

Your slab could be up here next.

Tell us where the job is and what you're cutting — same-day callback.