GJ Gentry General Engineering, Inc. | Upland, Ca.

Execute your project on time and with exceptional quality.

- Pipeline

- Concrete

- Grading

1297 W. 9th Street
Upland, CA 91789

Phone: 909.693.3391

Mon. - 7am - 4pm

Tues. - 7am - 4pm

Wed. - 7am - 4pm

Thurs. - 7am - 4 pm

Fri. - 7am - 4pm

Sat. - CLOSED

Sun. - CLOSED

pipeline contractor southern California,

general contractor southern California, grading southern California, concrete contractor, concrete southern California