Foundation Support of Hawaii is a foundation, crawl space and concrete repair company serving Oahu, Maui and Kauai. Its site says it has delivered solutions for over 25 years.
Services listed include foundation repair, crawl space repair, insulation, waterproofing and vapor barriers, commercial foundations, concrete leveling with PolyLevel injection, and concrete repair such as crack and spalling repair, sealers and sidewalk and driveway repair. The site also has a technical papers page. Helical piers appear only briefly in the pages reviewed, so ask directly whether they are used.
Call +1 808-201-1154, or the 808-427-5733 number on the site, or use the free estimate form. If a pier system is proposed, ask which type and why, how depth and load are verified, whether an engineer reviews the plan, and what permits and warranty apply.