BRIDGTON – Martyn Gregory has been appointed vice president at Howell Laboratories in the Shively Labs broadcast products division. Gregory will have overall responsibility for all the operations of Shively. He previously worked at Crown Castle International Corp Mobile Media, where he was vice president of service delivery. He has more than 25 years of experience in the broadcast industry. He began his career with the British Broadcasting Corp. upon graduation from the University of Durham, Durham, U.K. He lives in Bridgton.