Houston-based TAM International Inc. has appointed Michael Machowski as president, a news release said. He previously served as COO. The independent oilfield services company also announced L. Bentley Sanford has moved into the position of chairman of the board. Sanford joined TAM in 1982 and has more than 35 years of oilfield services business and management experience.With more than 40 years of domestic and international experience in the oilfield services industry, Machowski joined TAM in 2010, the release said.