Magnus LLP Chartered Professional Accountants Magnus LLP Chartered Professional Accountants is a Winnipeg based professional advisory firm providing services primarily to large non-listed entities, owner managed business and not-for-profit organizations based in Manitoba, Ontario, Saskatchewan, Alberta and British Columbia. We have provided assurance, tax and business advisory services to our clients since 1975. With a professional staff of approximately 20 individuals, including 15 Chartered Accountants, Chartered Professional Accountants or Certified General Accountants, our firm’s office is located in Winnipeg, Manitoba.