Sierra Hamilton is one of the largest providers of drilling-related engineering and consulting services to oil and gas exploration and production companies in the United States. Headquartered in Houston, TX, the company primarily serves its clients by placing qualified independent consultants on a day-rate basis to provide on-site supervision services across all segments of the oil and gas value chain, including exploration, drilling, completion and production. The consultants help to evaluate, plan and execute drilling projects that range from a single well to an entire field.

Sierra Hamilton was formed by the merger of Sierra Engineering and Hamilton Group. The company's revenue base is diversified across the continental United States and encompasses oil and gas wells, onshore and offshore rigs, and vertical/horizontal/directional drilling. In addition to its six offices in the United States, the company also operates offices in Pune, India, and Rio de Janeiro, Brazil, to serve the growing international demand for engineering and on-site supervision services.

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