Robert was educated at The Queen's University, Belfast where he came third in his year. After graduating from Queen's he completed his apprenticeship at L'Estrange and Brett.

Robert took the decision to set up his own practice and founded Robert G Sinclair & Co in 1983. Robert has acted for leading corporate and commercial clients and is well known in this field of work. He has acted in many high profile cases in these areas including tax cases, fraud cases and restructuring of major companies.

Robert has a specific interest in health matters and advises private clinics in relation to the various legal issues which may arise in the day-to-day operation. He has recently been appointed as a director to The Belfast Clinic.

Robert is well known in national hunt horse racing circles. He is a keen runner having completed events such as the New York Marathon and is a member of several golf clubs including the K-Club, Helen's Bay where he is currently Vice-Captain, Clandeboye, Aloha (Marbella) and Dunham Forest (Cheshire). As Managing Partner in the firm for over 20 years he oversees each specialist department.

With his vast commercial and legal experience and as a Queen's Law Graduate, Robert was delighted to be appointed to the Queen's University Foundation Board where he helps advance the strategic goals and objectives of the University. He is currently actively involved in the second fund raising campaign for the University and has been appointed to the committee of Health Sciences as led by Professor Paddy Johnston. Professor Johnston has spearheaded the centre for Cancer Research and Cell Biology which was supported by the Queen's Foundation Board.

Robert Sinclair is also a Board member of the committee for "Sustainable Process through Innovative Chemistry and Engineering" (SPICE).  The vision of SPICE is to be an internationally recognised leader in providing innovative sustainable solutions to global problems so that future generations have a safer and healthier quality of life.  One of the main focuses of SPICE is to conduct research and develop environmentally friendly chemical processes