Corpus Christi - (361) 883-4555     San Antonio - (210) 495-8000     Round Rock - (512) 284-8022


Roetta C. Rock


Roetta Rock is the President and majority shareholder of Rock Engineering & Testing Laboratory, Inc. Roetta commands 61% ownership of the firm, and her duties include Accounting and Billing, Human Resources, and Financial Management. She has been leading this company since its inception in 1998.

Mark C. Rock, P.E.

Vice President of Operations

Mark Rock, P.E. and his wife, Roetta, opened RETL in 1998. Mark has over 30 years of experience in the Geotechnical Engineering and Construction Materials Testing field. He has been the Project Engineer, Project Manager and/or Design Assistant on over 3,000 Geotechnical Engineering Studies across the Texas. Rock has a reputation for being extremely knowledgeable and experienced with the soil conditions of South Texas, and leads our Corpus Christi office.

Kyle Hammock, P.E.

Vice President of Engineering

Kyle Hammock, P.E. is a Senior Geotechnical Engineer and Vice President and leads the San Antonio RETL office. He has more than 29 years of experience in Geotechnical Engineering and Construction Materials Testing. He plans and oversees Geotechnical Engineering and Construction Materials Testing services in Central and South Texas and prepares reports along with reviews and evaluation. Mr. Hammock acts as Client Manager and Technical Liaison for regional clients and serves as Senior Project Manager for major projects.

Curtis Rock

Chief Operating Officer

Curtis Rock has been with RETL, Inc. since 2004. He holds a Bachelors in Business Administration and majored in Management Information Systems and Economics, with a minor in Criminal Justice. Mr Rock has been heavily involved in the community from governmental appointments and non-profit business associations. Mr. Rock primarily oversees HR, Accounting, Marketing, and IT for all offices.

Arnie Hammock, P.E.

Vice President, Round Rock

Arnie Hammock, P.E. has over 34 years of experience providing Geotechnical Engineering and Construction Materials Testing. As the leader of our Round Rock office, he is responsible for providing Project Management and Engineering Support for our Austin area clients. Mr. Hammock serves as Senior Geotechnical Engineer and Senior Project Manager on major projects.

Bobby Jemison

Vice President, Corpus Christi

Bobby Jemison has been working in the Geotechnical Engineering and Construction Materials Testing industry for over 26 years. He is responsible for planning, controlling, monitoring, managing, and directing the assigned project resources to best meet the project objectives. His main task is Project Management, and he is responsible for generating proposals and performing selected laboratory tests on soil samples and creates boring logs in our Corpus Christi office.

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