Ram Jack Pacific is a Ram Jack dealer serving San Diego and Southern California, from El Cajon. Ram Jack's website says the brand has worked on foundation solutions since 1968, and this location operates under that name. The page lists contractor license number 1003878.
The Ram Jack site groups services into foundation repair (inspection, slab repair, pier and beam support), concrete lifting and repair, basement and wall solutions, and in some regions waterproofing. For commercial work it describes steel piles that let engineers design foundation solutions. The site also has pages on a lifetime transferable warranty, financing, case studies and engineering resources.
Contact the dealer at +1 619-503-3078 or through the Ram Jack estimate form. Helical piles are only one of several systems Ram Jack uses, so ask whether helical piles are actually proposed for your project, why, and how the design is verified. Also ask for the warranty terms in writing. These are general suggestions, not statements about this dealer's practice.