Skip to main content
By clicking “Accept All Cookies”, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. View our Privacy Policy for more information.


Please tell us about yourself in order to download "Press Release"

We will never sell or disclose your email address to anyone.
Valid number
Thanks for telling us about yourself!
Please click the link below in order to download.

"Promotion Announcements"

Oops! Something went wrong while submitting the form.

Long Beach, CA (June 28, 2023) – Twining, Inc. announced two promotions. Steve Schiffer is now Chief Revenue Officer (CRO) and Mariel Attento Rhorer is now the firm’s Chief Strategy Officer (CSO). These new roles are a reflection of both Steve and Mariel’s dedication to Twining as well as the firm’s commitment to being a leading provider in engineering consulting services.

Steve joined Twining nearly 20 years ago and in that time, has consistently been a lead revenue driver for the firm. Robert M. Ryan, Owner and CEO, spoke on Steve’s passion, saying “He’s been a mentor for many of our people and his industry presence is huge. Steve has been deeply involved in all discussions around what to sell, to whom to sell it, how to price it, and all aspects of revenue production for Twining. I’m proud to recognize this with his new title and expanded role and I know Steve is excited to have the opportunity to put his knowledge and skills to work in that role.” In his new role, Steve will take on continue to provide mentorship to the sales team while also taking on new responsibilities that focus on Twining’s future and strategic initiatives.

Mariel joined Twining, Inc. in 2014 and has consistently exhibited exceptional professionalism, a strong work ethic, and an enthusiasm for excellence. Of Mariel, Rob says “Mariel demonstrates an unwavering commitment to our company’s mission and values. This promotion is a testament to her exceptional abilities and the invaluable contributions she has made to Twining, Inc. We are confident that she will excel as the Chief Strategy Officer, and we look forward to her continued success.” As CSO, Mariel will use her passion for new technologies and acquisition strategies to drive Twining’s growth goals.


Twining, Inc., based in Long Beach, is the leading provider of construction quality control and engineering services in California. Through its statewide network of offices, Twining provides concrete applied engineering and consulting services; geotechnical engineering; construction materials testing and special inspection; condition evaluation and assessment of existing structures; forensic investigation of existing structures; stormwater management; specialty testing; and asphalt pavement quality assurance, design, and materials evaluations. In 2023, the firm celebrated it’s 125th year as a company.

To learn more about Twining, Inc. visit