Judge Charles E. Wiggins of the U.S. 9th Circuit Court of Appeals will conduct a ceremony swearing in Gregory C. O'Brien Jr. as a Municipal Court judge at 2 p.m. Saturday in the Bidwell Forum at the Glendora Library. Wiggins is a former San Gabriel Valley congressman. O'Brien, 39, of Glendora, was recently appointed to Citrus Municipal Court in West Covina. He succeeded Eugene Osko, who resigned to resume private law practice. O'Brien is a former Los Angeles deputy city attorney and worked for six years as an attorney for Southern California Edison Co.