B.D. Miller, vice president of Pool Company's Operations Support Services Division, has announced that Nicholas Petronio has been elected vice president-engineering. He is responsible for all engineering support for the company's three expanding operating units—Pool Well Servicing Company, Pool Offshore, and Pool-Intairdril.

Mr. Petronio joined Pool Company in May 1978 as manager of construction in the Operations Support Services Division, and was promoted to director of engineering in November 1978. He has supervised engineering for the construction of more than 30 onshore and offshore rigs.

Prior to joining Pool, he was shipyard technical manager for a major construction yard, and had accumulated more than 10 years' experience in engineering and steel fabrication including computerized stress analysis and design, production and quality control, training, and shipyard management.