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 Don G. O'Brien Professional Corporation 

Accounting services for Canada and the United States

We are a full-service Accounting firm based in Alberta. We offer a broad range of services for business owners, executives, and independent professionals. We are affordable, experienced, and friendly.

Trust our personal approach and knowledge of Canadian & U.S. Tax. Choosing Don G. O'Brien Professional Corporation allows you to worry less about your finances and focus more on what truly matters to you.

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Learn About Don G. O'Brien Professional Corporation


We’ve been providing the Southern Alberta community with the finest accounting and tax advice for over 10 years. With our certified accounting training and years of experience in the field, no financial issue is too complicated for us to tackle.

We specialize in providing U.S. Tax services to our clients but also to other accounting firms that do not have this expertise. We can also offer the specialist area of auditing for not-for-profit organizations. From consultation on business and tax issues to management and technological solutions for accounting needs, we cover the entire spectrum of and beyond.

Contact Us


We would love to hear from you!

We will answer all of your questions, as they impact both your tax and financial situations. Contact us to see how our accounting expertise and personalized services can save you time, money and frustration on all accounting matters.

At Don G. O'Brien Professional Corporation, we've been serving the Accounting needs of Lethbridge, Alberta and the surrounding areas for years. If you need help managing any aspect of your home or business's finances, we want to hear from you.

Please fill out this form and let us know how we can be of service. We will happily offer you a free consultation to determine how we can best serve you.

Thank you for visiting. We look forward to working together!

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