Casto Petroleum Engineering serves a variety of clients in matters pertaining to the oil and gas industry. Click here for a list of services we offer. We are located in Marietta, Ohio and we evaluate unconventional and conventional oil and gas assets throughout the United States. With access to powerful datasets and software, we’re able to leverage technology to the advantage of our clients in an efficient, cost-effective manner. Please Contact Us if we can be of service to you.