Hendry Warren Chartered Professional Accountants satisfied clients include corporations, partnerships, sole proprietorships and non-profit organizations. Our more than 1,600 corporate and 2,000 personal clients represent a cross-section of the Ottawa business community.



I found Blair and his staff to be extremely professional providing excellent timely service. As a CPA myself with knowledge of the profession, I was fully satisfied of the extent and quality of the work performed. Staff were fully engaged and the work was completed in a timely fashion as we had a deadline for our AGM. Although the audits went well, Blair made several recommendations to our organization which improved our internal procedures. I have no hesitation in recommending Blair Duffy and the firm of Hendry Warren LLP as we found the services provided to us extremely helpful, professional and competent.

Ron Allen, CPA, CMA, Treasurer – Kanata United Church


Jacob has been invaluable over the past 18 months in assisting with the incorporation and start-up of my new business venture.  I trust Jacob's advice on complicated income tax and HST matters to allow me to focus on what is most important - my business!

Rupert Bonham-Carter


I have used Marie Fraser and her team at Hendry Warren for business, personal and special projects. Deep enough bench strength to cover anything, and small enough to pay attention.     

Colin Goodfellow


Ian Hendry is a truly responsive and responsible partner in our business and has been for over 20 years. I would (and have) recommend his services to everyone.

Les Bell, CPA, CA, President, Lincoln Heights Ford Sales Ltd.


In every instance where advice or assistance has been needed it has been provided with clarity and timeliness. And with a very satisfactory outcome. Our accounting staff have always appreciated the efficiency of Hendry-Warren team assigned to our audits and review engagements. We appreciate that Hendry-Warren LLP is able to support our needs as a paperless group of companies. 

Gordon Miller, President, UNIGLOBE Premiere Travel


From the partners to the new graduates, the quality of service and advice were second to none…we rely heavily on the advice we are given from both an audit and tax perspective…I know that our firm can count on Hendry Warren LLP to be accurate, timely and professional at all times. 

Don Silverman, CFO Sciemetric


It all started in the fall of 2009 with CRA targeting small IT consulting companies, like mine.

My company received the first letter and the Audit Questionnaire from CRA in October 2009. When my accountant simply refused to help me, I realised that I was in trouble. It is hard to describe the feeling of belittlement and the stress I felt. 

A lawyer recommended Nancy Nicks, with Hendry Warren Chartered Accountants. I have no words to describe the happiness and relief I felt after the first phone call; finally, someone is willing to help me. Right at the first meeting, Nancy’s confidence and professionalism brought back hope.

It seemed that letters from CRA were arriving every day. Nancy was always patient with me and always had a good advice and recommendations. After two years, CRA confirmed that they will maintain their position from the audit. I gave up! However, Nancy suggested objecting one last time. She had already prepared the letter. It was so well written, strong and clear.

A month later, another letter arrived from CRA and the biggest surprise. The Appeals Division reversed its decision. I could not believe my eyes, I got all my money back! The biggest reward was the feeling of freedom and justice. None of this would have happened without help from Nancy and her team, their professionalism and dedication, I cannot thank them enough.

Thank you once again,



Hendry Warren LLP has been easy to work with, dependable, personable and professional and are always available when we need them. The annual audit process is efficient and timely and their staff is always knowledgeable and well prepared.

 Chris Jerome, Treasurer, Habitat for Humanity – National Capital Region


Hendry Warren is a very professional organization who are very sensitive to client needs and timelines.   Marie Fraser and all of the staff that I have met and worked with exhibit the same degree of courtesy and professionalism. It is always a pleasure working with them.

 Lynn LaHam CPA, CGA,  Crossroads Children’s Centre