Signet Testing Laboratories, Inc. (Signet), headquartered in Hayward, CA since 1966, is a wholly-owned subsidiary of United Engineering Resources, Inc. (UER). The UER family of companies includes:
United Engineering Resources, Inc. (UER) is a privately owned company that provides a full range of construction support services including geotechnical engineering, construction inspection and laboratory testing services on public and private projects throughout Northern California.