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Billy Linehan

Management Consultants

Where do they serve

Remote

Skills
Strategic Consulting
Business Functions
HR Leadership Marketing Sales Strategy Sustainability
Sectors
Not for Profit Other
Services
Business Strategy Change Management Strategy Competitive Analysis Exit Planning Leadership Development Leadership Practices and Styles Marketing Strategy & Planning Performance Management and Feedback Processes Strategic Business Planning & Execution Teamwork
Bio

Independent Business Consultant & Mentor

Billy Linehan is a professional consultant and mentor with over 30 years of experience working with SMEs, family businesses, non-profit organisations and growing companies. He has dedicated his career to helping business owners navigate change, improve performance, and achieve sustainable growth. With extensive experience across multiple sectors, Billy brings a practical, results-driven approach to every client engagement.As an Associate of Agile Executives, Billy is part of a trusted network of independent consultants, fractional executives, and business mentors who support Irish and international SMEs in achieving their business goals. As  Partnership Director at Target Integration, he created and led their Business Connector initiative to help companies adopt digital transformation solutions. See his profileLinkedIn Billy Linehan. and the Celtar Advisers website.

Expertise & Approach

Billy works with business owners, leadership teams, and SMEs to tackle critical challenges in:
  • - Business Strategy & Growth – Developing practical, achievable growth strategies that fit each business’s strengths and market position.
  • - People & Performance – Helping teams and leaders clarify roles, improve collaboration, and enhance productivity.
  • - Change Management – Assisting companies in aligning individuals and the organisation with evolving goals, new business environments, and strategic shifts, ensuring teams adapt successfully and work towards shared success.
  • - Family Business Transitions – Advising family-run businesses on succession planning, leadership transition, and long-term stability.
  • In addition he has strong links to Digital Integration companies who support SMEs in adopting the right digital tools for operational efficiency, CRM, and ERP implementation. Billy is one of the very few consultants in Ireland with deep, hands-on experience gained from working directly with hundreds of business owners over three decades. His career has been built on practical experience rather than theory, helping SMEs move from strategic thinking to action quickly.

Background & Experience

  • Billy has worked extensively in business consulting, mentoring, and leadership roles across a range of industries, including manufacturing, professional services, technology, and training. His career has included:
  • - Founder of Celtar Advisers – A long-established business consultancy supporting Irish SMEs with strategy, people, and growth.
  • - Mentor & Adviser – Active in mentoring through Enterprise Ireland, Skillnet, and local business networks, providing advisory support to small business owners and startups.
  • - Partnerships – Strong connections across Ireland, the UK, and Europe, with experience in cross-border trade and partnership development, he is deeply involved in business and entrepreneurship ecosystems, including as a co-founder of StartUp Ballymun and as a supporter of initiatives, such as Techstars StartUp Weekend Women Dublin,  where he helps connect early-stage businesses with mentors, investors, and opportunities.

Why Work with Billy?

  • Unmatched Experience – Over 30 years advising SMEs, with insights gained from working directly with hundreds of business owners.
  • No-Nonsense Approach – Practical, strategic, and action-oriented consultancy, tailored to each business.
  • Strong Network & Partnerships – Well-connected in Ireland’s SME, digital transformation, and entrepreneurship sectors.
  • Flexible & Adaptable – Works with companies of all sizes, from micro-businesses to established SMEs, in one-off projects or ongoing advisory roles.
  • Billy is passionate about helping businesses clarify their goals, build stronger teams, and create sustainable growth strategies. Whether you need help with business strategy, change management or team performance, Billy brings deep expertise, fresh thinking, and a results-driven approach to every engagement.