# RMA Companies

RMA Companies is a Geotechnical Engineering and Materials Testing based in Rancho Cucamonga, United States.

## Overview

- **Organization type:** Geotechnical Engineering and Materials Testing
- **Headquarters:** Rancho Cucamonga, United States
- **Region:** North America
- **Address:** Rancho Cucamonga, CA, United States
- **Founded:** 1962
- **Assets under management:** Undisclosed
- **Website:** rmacompanies.com
- **LinkedIn:** https://www.linkedin.com/company/rma-group-inc

## Regulatory record

- **Reports private funds:** No

## About

RMA Companies was formed as a holding company to consolidate regional engineering, testing, and inspection firms that serve critical infrastructure and construction projects. Its operating companies provide geotechnical engineering, construction materials testing, and environmental consulting, with an emphasis on transportation, water resources, and energy infrastructure. The company's technical services span geotechnical investigations, construction quality assurance, and environmental site assessments. Its constituent firms work on public and private projects, from highways and bridges to commercial developments and utility-scale energy installations. Geographic concentration appears strongest in California and adjacent Western states, consistent with the firm's Rancho Cucamonga headquarters and the regulatory and seismic complexity that drives demand for specialized engineering testing in the region. The firm's scale, principal leadership, and specific financial backing are not publicly disclosed. Structurally, RMA Companies represents a consolidation play in the fragmented engineering testing and inspection market, a sector where scale enables broader geographic coverage, deeper technical bench strength, and the ability to serve large general contractors and public agencies across multiple jurisdictions. This holding-company architecture differs from a traditional single-family office by functioning as an operating business platform rather than a passive investment portfolio.

## Sectors

- Engineering & Testing Services
- Infrastructure

## Questions

### What services does RMA Companies provide?

RMA Companies provides geotechnical engineering, construction materials testing and inspection, and environmental consulting services. These services support infrastructure and building projects including highways, bridges, water systems, and energy facilities. The work spans from pre-construction site investigations through quality assurance during construction.

### What geographies does RMA Companies serve?

The firm concentrates on the Western United States, with its headquarters in Rancho Cucamonga, California, and project activity strongly tied to the infrastructure needs of California and adjacent states. Specific office locations beyond the headquarters have not been publicly confirmed.

### What types of projects does RMA Companies work on?

RMA Companies through its subsidiaries works on transportation infrastructure, water and wastewater systems, energy projects including renewable installations, and commercial and institutional building construction. The emphasis is on projects requiring specialized subsurface investigation, construction quality control, and environmental compliance.

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Last updated: 2026-08-11T02:43:31.692Z

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