The actions came during the freeholder board's Stated Annual Meeting in Morristown, during which incumbent Hank Lyon was sworn in for his first full three-year term as a freeholder.
DeFillippo is a former mayor of Roxbury who joined the freeholder board in January 2014. Cesaro, a former Parsippany councilman, has been on the board since June 2012.
Lyon, of Montville, joined the freeholder board in March 2012, and was then elected to fill a two-year unexpired term on the board in November 2012.
Also, during the meeting, John Pecoraro took the oath of office as Morris County Surrogate, beginning his 5th term in that position.