Background

Billy Linehan is a specialist management adviser working with entrepreneurs and leaders of organisations. He set up Celtar in 2008 to meet the needs of business and organisation leaders so they could access high quality consultancy advice that is designed specifically for them. As independent management consultants we support managers, directors and stakeholders of organisations by facilitating the achievement of their objectives.

Billy has set up and managed a unit of 35 consultants, working with businesses in central London and his experience includes advising owner managers across many sectors. He advises growing SMEs as a tutor and Business Counsellor on several IMI (Irish Management Institute) business development programmes and provides a mentoring service to clients of Dublin city enterprise board.

Billy holds the CMC qualification (Certified Management Consultant), is a member of the Institute of Management Consultants and of Blanchardstown Chamber of Commerce. He continues his learning through working with innovative clients, attending workshops and conferences. As a promoter of training and development Billy co-founded the Highway to Learning network (www.h2l.ie). His training offer includes a series of practical workshops on strategic planning and performance management. Billy is also the publisher of the INCITE ezine, spreading the news of better business practices to intra/entrepreneurs.

Celtar associates and business partners

Through quality assured associates and business partners, clients can access a wide network of experts in financial management, marketing, production management, market research, human resource management, technical consultancy on environmental and waste management, personal communications and supply chain management. 

Selected client quotes

“Being an owner manager and having Billy available to advise and challenge on key issues has proved invaluable to the company’s strategic development. His professional and honest business mentoring has made a significant contribution to our company’s growth over the last three years.”   

 “As a developing company, we look to Billy to guide the Management Team through this time of growth and change. I am delighted with the results and look forward to continuing our partnership in the future.”


“For a no nonsense approach and evaluation of business management processes Billy is excellent in his ability to quickly identify, and offer solutions to, areas of management that haven’t been performing as we initially believed. Billy showed us new systems that have resulted in major benefits to the company’s performance in response to the needs of our customers and staff.”

 “If you are looking for a coach to throw roses at you at every hands turn and tell you how great you are, then Billy is not your man. However if you want an honest informative assessment of where you are and where you should be, I could not recommend Billy highly enough.”

“The work that Billy did for us was thorough, systematic, and well managed.  It did prove valuable to have an ‘outsider’ – someone who was independent, to carry out this work.”