Geotechnical Engineering

Our staff combines local and international experience that…


Soil and Construction Material Testing

Our construction material testing laboratory has been in…


Environmental Drilling

Jaca & Sierra Engineering, PSC (J&S) has an environmental…


Subsurface Utility Engineering (SUE)

Jaca & Sierra Engineering, PSC recognizes the need to…


Geotechnical Construction

Since 1967, Jaca & Sierra Engineering, PSC has been an…


GPR Scans for Steel Identification

Jaca & Sierra Engineering, PSC is known to perform…


Construction Quality Management

J&S has extended capabilities of other specialized quality…