* * US-based Newpark Resources appointed Gregg Piontek as controller and chief accounting officer.
* * Denver-based Bill Barrett Corporation has hired R Scot Woodall as senior vice president of operations.
* * Andy Westlake, Jeff Measamer and Patrick O'Brien join the board of the Houston operation of global subsea engineering company MCS.
* * Stephen Gutteridge appointed to the board as non-executive chairman of UK-based oil and gas explorer Meridian Petroleum, replacing Donald Caldwell, who remains on the board as a non-executive director.
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