There are changes happening in the Carbon County District Attorney's Office.

On Thursday, the Carbon County Commissioners approved two changes to fill a vacancy that will be created on Dec. 31. William E. McDonald of New Ringgold, who currently serves as the first assistant district attorney, will retire at the end of the year.The changes include Michael S. Greek of Nesquehoning moving from the second assistant to first assistant district attorney; and Cynthia Dydra-Hatton of Lehighton from third assistant to second assistant district attorney. Both moves are effective Jan. 1.The commissioners also approved a number of personnel actions during their last meeting of the year:• The retirement of Christopher J. Kegel of Palmerton as chief real estate clerk for the sheriff's office, effective May 1.• The resignation of Jason A. Helmer of Summit Hill, 911 operator at the Communications Center, effective Dec. 29.• The employment separations of Barbara J. Houser and Margaret A. Houser, both of Tamaqua, corrections officers, Carbon County Correctional Facility, effective Dec. 17.• The change of status for Rachel A. Singlesether of Kunkletown, from county caseworker I to county caseworker II, Children and Youth Services, effective Dec. 30.• The change of status for Carl R. Nothstein of Lehighton, from seasonal park maintenance, Parks, to temporary sergeant, Corrections, and seasonal park maintenance, effective Jan. 5.• The internship of Kory Lopata of Nesquehoning, a criminal justice major at Lebanon Valley College, in the adult probation office. The term of the internship is from Jan. 12 to May 2.In other matters, the county approved a supplemental agreement, as prepared by the Pennsylvania Department of Transportation, with Carbon Engineering Inc. for part III services during the replacement of county bridge 16 over Koch Road in Towamensing Township due to time extensions. The new total for part III is $38,914.72; for a new maximum amount of $641,071.18. The new completion date for the bridge is May 12, 2015.