Celtar Ltd

Celtar Limited is a Dublin-based business advisory practice founded by veteran mentor Billy Linehan. Drawing on more than three decades of experience, Celtar helps owners and senior managers clarify goals, solve complex problems and make confident decisions. The firm's practical, hands-on approach covers strategic planning, organisational reviews and growth road-maps, ensuring clients achieve long-term success.

Key specialisations include bespoke mentoring for SMEs, guidance on business transfers and succession, support for setting up and operating charities, and advice on environmental policies that enhance corporate reputation. Celtar also provides insight into award schemes, helping clients distinguish genuine, state-backed recognitions from vanity prizes. Through partnerships with networks such as Agile Executives and active involvement in community events like StartUp Ballymun, the company connects entrepreneurs across Ireland with free mentoring and valuable resources. Whether navigating a C-suite promotion, preparing a grant application, or launching a new venture, Celtar delivers clear, actionable advice tailored to each client's needs.