Please improve the consistency in the given text.
Mark C. Brickell is a trader in the derivatives industry. (1). Mark C. Brickell was a trader at J.P. Morgan and served as chairman of the International Swaps and Derivatives Association from 1988 to 1992.
Mark C. Brickell is a trader in the derivatives industry. (1). He was a managing director at J.P. Morgan and served as chairman of the International Swaps and Derivatives Association from 1988 to 1992.