Co-opted to the local authority in 2018, the Sinn Féin local representative went on to secure a Bray West seat in the 2019 local elections and was re-elected in 2024. He then served as Cathaoirleach of the Muncipal District between 2024 and 2025.
In announcing his decision to withdraw from his role as a councillor to take up a position in the youth work sector, Mr O’Brien follows in the footsteps of his district colleague, Fine Gael’s Aoife Flynn Kennedy, who stood down in March last year due to personal reasons and now works in the housing in the department at Dun Laoghaire-Rathdown County Council.
Reflecting on his time as a local councillor, Mr O’Brien spoke candidly about the realities of the role.
“Local politics is not a symbolic role,” he said. “It is complex, challenging, demanding and relentless. It requires policy literacy, budget scrutiny, committee work, community advocacy, attention to detail and, very often, deep interpersonal support for the most vulnerable people in our community, and that’s before you even consider the manoeuvres of the political arena.”
He highlighted how the role is public-facing, subject to constant scrutiny and often carries an expectation of continuous availability.
“I took every part of that responsibility seriously and tried my very best to honour it fully.
“What I have always tried to bring to this role is integrity and humility, which meant carrying an honest and ongoing reflection on my own effectiveness. I know how hard I have tried.
He also highlighted the personal impact of public life on those closest to him.
“There is one thing that all councillors would agree on without hesitation, entering politics has an unavoidable impact on family.
“My family are incredibly proud of me, and, to their credit, they have been the most important piece of scaffolding throughout the ups and downs of this journey. They are always part of the conversation when big decisions are being made, and this was no different.
“Perhaps there will be some relief, although that may change when they realise, I’ll be around more than I used to be.”
Mr O’Brien concluded by expressing confidence in the future representation of his party and community.
“I leave with gratitude, respect and confidence in the continuity of representation. I have every faith that my successor will represent our party and our community with honour and distinction.”
Wicklow Sinn Féin TD John Brady paid tribute to his colleague following the announcement.
“Dermot has been an outstanding public representative who served his constituents with dedication, integrity and an unwavering work ethic. He brought enormous commitment to his role and approached every issue with diligence, compassion and a deep sense of responsibility.
“He will be a significant loss to Wicklow County Council and to frontline politics in the county. However, Dermot remains deeply committed to Sinn Féin and will continue to play a valuable role within the party. The wealth of knowledge, experience and dedication that he brings is truly invaluable.”
“I want to sincerely thank Dermot for his service to the people of Wicklow. He leaves very big shoes to fill, and the next person to step into his role will have a high standard to live up to.” he added.
Funded by the Local Democracy Reporting Scheme