As Director of Research David directs the ongoing research into securities selection and portfolio strategies used to enhance the Navigator investment programs. In the late 1970s, David began to develop economically based, quantitatively driven econometric models. David has also developed technical models used to enhance relative returns and reduce the risks of ETF and fund based products. David is a member of the Clark Capital Investment Team. David was formerly President and Chief Investment Officer of RTE Asset Management which merged with Clark Capital in 2005. David holds a degree in Electrical Engineering from Lehigh University.