Enright, who is taking a job with the University of Maryland School of Medicine, is being replaced by Mark Miller, a 32-year veteran of Baltimore-area media outlets, including 21 years as the news director of WBAL Radio.
Effective Wednesday, Nov. 7, Miller will be the county's press secretary, managing the Office of Public Information.
In a news release, Ulman thanked Enright for his "tireless work and skillful management" during his time with the county, and wished him well in his new position. Ulman also said he was "thrilled" to have someone with Miller's experience working with the county government.
"Mark understands firsthand how critically important effective communication is, and he is extremely well-versed in both the old- and new-world media," Ulman said.
Ulman also announced Monday that David Nitkin, the county's director of policy and legislative affairs, will assume additional responsibilities as director of communications.
In addition to these changes, Director of Constituent and Community Affairs Candance Dodson-Reed is being promoted to deputy chief of staff, Ulman announced.
She is replacing Ian Kennedy, who this week started a new position as communications director at the Horizon Foundation.
Enright will be joining the University of Maryland School of Medicine as executive director of strategic initiatives. He has been with county government since Ulman took office in December 2006.
"When I say it's been an honor working for this county and with Executive Ulman and his staff, I truly mean it," Enright said in an email. "I will miss working for the people of Howard County, but I can assure residents that they are in better hands with Mark Miller and David Nitkin."