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Mariel Attento Rhorer


Mariel has 20 years of engineering sales and client service experience, specializing in both public and private sector infrastructure projects. Mariel began her career developing Northern California for Twining, Inc.  and is based in the San Francisco Bay Area. Mariel oversees Marketing teams and works alongside the executive team to generate long-term company strategy. Backed by a strong track record of successfully developing relationships and understanding client and project needs, Mariel heads the expansion of the Twining Group of Companies and is responsible for new growth and increased market share.

Our Mission

In cooperation with our clients, we protect the public and our communities by providing engineering, testing, and inspection services to help ensure quality and conformance with construction standards within the built environment.

By empowering and encouraging our team to act with integrity and to be responsive, we contribute to the success of the projects we service.

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