Execute your project on time and with exceptional quality.

OUR LOCATION
OVER 100 YEARS EXPERIENCE
OUR SERVICES

- Pipeline

- Concrete

- Grading

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© 2019 by GJ Gentry General Engineering Inc.

1297 W. 9th Street
Upland, CA 91789

Phone: 909.693.3391

BUSINESS HOURS

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 

OPTIMUS LOGISTICS

HEARTLAND RANCHO CUCAMONGA

I-5 WATER RELOCATION

OLIVIO EDINGER

OAKMONT HICKORY WAREHOUSE

SIERRA RIDGE

SYCAMORE HILLS PLAZA

IPT ARROW ROUTE

HUNTINGTON

BEACH

WALMART

RIDGECREST

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BEST EMPLOYEES IN THE INDUSTRY

GJ Gentry General Engineering Inc. is most proud of the people it employs. 

GJ Gentry General Engineering Inc

1297 W. 9th Street Upland, CA 91786

Phone: 909.693.3391

Mon. - 7am - 4pm

Tues. - 7am - 4pm

Wed. - 7am - 4pm

Thurs. - 7am - 4 pm

Fri. - 7am - 4pm

Sat. - CLOSED

Sun. - CLOSED