The Univest Corporation will get a new C.E.O. at the start of next year. Jeffery Schweitzer will replace Bill Achiele, who will stay on in an advisory role as chairman of Univest Corporation and Univest Bank and Trust Company when he retires his other posts at the end of the year. Schweitzer worked for Ernst and Young before joining Univest in 2007. Schweitzer is a graduate of Notre Dame.