Business, Police/Fire, Politics

Olszewski names interim Baltimore County Chief of Police, other key leadership positions



TOWSON, MD— Baltimore County Executive Johnny Olszewski on Monday made the following personnel announcements:

  • Sameer Sidh has been named Baltimore County Deputy Administrative Officer for Economic Development and Infrastructure
  • Colonel Dennis J. Delp has been named Baltimore County’s Interim Chief of Police, effective December 6
  • Dori Henry has been named Chief of Staff
  • Jennifer Aiosa has been named Director of Government Affairs
  • Sevetra Peoples-Brown has been named Chief Diversity, Equity and Inclusion Officer

“I’m thrilled that these talented and dedicated public servants will put their experience and passion to work on behalf of the residents and communities of Baltimore County,” Olszewski said.

Sameer Sidh will join the Olszewski administration’s senior leadership team as a deputy administrative officer overseeing the County’s economic development and infrastructural agencies. Most recently, Sidh served as chief of staff to Howard County Executive Calvin Ball, where he secured historic investments in school construction — adding 2,400 new seats for County students — oversaw high profile land use issues, including the acquisition of the Camp Ilchester and Savage Remainder properties, and earned acknowledgement from President Biden, the United States Conference of Mayors and the National Association of Counties for management of COVID relief funding. He previously served as chief of staff at Towson University where he helped manage the “Together Towson” anchor institution initiative, and has served as the director of the City of Baltimore Mayor’s Office of Citistat, deputy chief of staff for the Maryland Department of Transportation, and acting director of StateStat under Governor Martin O’Malley. He holds a Bachelor of Arts in Political Science from James Madison University and a J.D. from the University of Baltimore School of Law. He will join the administration, effective December 19, 2022.

“Sam is an experienced, thoughtful, and energetic leader who brings impressive, top-level management experience and a deep knowledge of public policy — I’m thrilled to have him join our team,” Olszewski said.

Colonel Dennis Delp is a 28-year veteran of the Baltimore County Police Department, where he has held senior leadership roles including captain of the department’s Training Section, captain of the Cockeysville Precinct – one of the largest populated precincts in the county – and captain of the Forensic Services Section. Delp is a graduate of the FBI National Academy and holds a Bachelor of Science in Organizational Leadership and a Master of Science in Organizational Leadership from Johns Hopkins University. His position will be effective December 6, 2022 as Baltimore County continues to conduct a national search to succeed Chief Melissa Hyatt.

“Colonel Delp is a highly-respected and decorated veteran of the Baltimore County Police Department and I am thankful for his willingness to serve as interim chief of police as Baltimore County continues its search,” Olszewski said. “I am confident that his decades of experience in the department and proven leadership will help ensure Baltimore County remains a safe place to live, work, and raise a family.”

Dori Henry has served as interim chief of staff since September 2022. Prior to that role, Henry served as director of communications and deputy chief of staff for the Olszewski administration. Previously, she oversaw communications for the Bloomberg American Health Initiative at the Johns Hopkins Bloomberg School of Public Health, served as assistant secretary for public affairs at the U.S. Department of Labor, and held senior roles at the U.S. Department of Justice, the Maryland Department of Health, and the Maryland Department of Labor, Licensing and Regulation. She holds a Bachelor of Science degree from James Madison University, and a Master of Science from Boston University.

“Dori has been an invaluable partner over the past four years and I’m thrilled to have a strategic thinker and proven leader like her serving as our chief of staff as we begin our second term in office and continue our ongoing work to build a better Baltimore County,” Olszewski said.

Jennifer Aiosa currently serves as Baltimore County’s chief sustainability officer, where she leads the County’s efforts to mitigate the impact of climate change and to promote sustainability. Previously she served as executive director for Blue Water Baltimore, where she led the environmental nonprofit’s work, including state legislative efforts focused on clean water, green stormwater infrastructure, climate resilience, and more. She spent 12 years as a senior scientist for the Chesapeake Bay Foundation where she routinely worked with legislators and regulators on issues related to Chesapeake Bay, agriculture, and climate change, and in senior advocacy roles for the Maryland Department of Planning and Maryland Department of Natural Resources. Aiosa earned a Bachelor of Science in Marine Sciences from the University of South Carolina and a Master of Science in Environmental Sciences from the University of Virginia.



“Jenn has been a trusted and respected advisor who brings a wealth of advocacy experience in Annapolis and beyond. I’m thankful for her willingness to lead our administration’s legislative efforts so that we can continue fighting to expand opportunity in every community.”

Sevetra Peoples-Brown has served as the County’s interim chief diversity, equity and inclusion officer since July 2022. Previously, she served as special assistant to County Administrative Officer Stacy Rodgers since 2019. Prior to joining County government, she served as special assistant and acting chief of staff to the director of the Baltimore City Department of Social Services. She has also served in various roles at the U.S. Department of Health and Human Services, the Bureau of the Census, and the Milken Institute School of Public Health at George Washington University. Peoples-Brown holds a Bachelor of Arts from Hampton University, a Master of Business Administration from Strayer University, and a Master of Public Health from the George Washington University Milken Institute School of Public Health.

“Sevetra has been a vital member of our leadership team and has demonstrated a passion for this critical work. She is the right person to lead our efforts to ensure Baltimore County continues to instill principles of diversity, equity and inclusion across our enterprise,” Olszewski said.

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