Another top administrator at Upstate Medical University has stepped down amid a state investigation of possible executive pay padding at the SUNY campus. Steven C. Brady, senior vice president for administration and finance, retired today, according to Dr. Gregory Eastwood, officer in charge of Upstate. Brady's retirement comes less than a week after Dr. David R. Smith, Upstate's president, announced his resignation after SUNY revealed it was investigating his compensation. Brady, 66, of Chittenango, also served as executive director of MedBest Medical Management Inc., a company affiliated with Upstate. It was through that company that Smith set up a deferred compensation plan in 2010 worth more than $349,000 without SUNY's approval, according to SUNY Chancellor Nancy Zimpher.