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Diana Hillier,CPA, CMA



Diana Hillier, CPA, CMA

Diana is an experienced finance leader with a broad range of senior leadership tenure. She takes pride in her professionalism and ability to significantly contribute to the operations and success of the organizations she works for. Diana is a Chartered Professional Accountant (CPA), Certified Management Accountant (CMA), and has an Honours Business Administration degree from Wilfrid Laurier University. She expanded her professional certifications to include Long Term Care Administrator when she completed the OANHSS training during her time at The Elliott Community.

After starting out and spending over a decade in private sector manufacturing with McNeil Consumer Healthcare (a Johnson & Johnson subsidiary), Diana answered her calling to make a difference in public and not-for-profit organizations (WDG Public Health and The Elliott Community) where she could apply her corporate training and experience to take these businesses to a new level. After eleven years in these roles, Diana followed her passion to become a sole proprietor, offering business consulting and accounting services for multiple clients over the years, including the City of Guelph where she was contracted to lead and complete some key projects on their behalf.

In her 25+ years of experience in financial management roles, Diana was accountable to the governing Boards and CEOs for the financial integrity, reporting, and all business operations related to finance and other administrative functions. She has had extensive opportunities to identify, lead, and implement new projects, systems, and processes, resulting in rewarding successes for herself, her teams, and the organizations she worked for. Accounting, budgeting, financial reporting, and treasury functions with a focus on technology and process improvement are her specialties.

Diana’s primary objective, professionally and personally, is to make a difference. She is passionate about her work, loves to lead teams and individuals to achieve their goals, and strives to not only succeed, but to excel, at what she is hired to do while developing strong relationships along the way.

In her leisure time, Diana loves being outdoors; enjoying a round of golf, gardening, walking the beautiful areas in her home city of Guelph, or just relaxing in her backyard. Diana is a proud Mom of two adult sons and enjoys whatever time she can get sharing in their lives as they grow and prosper.

Diana serves clients in the Guelph and surrounding area.


  • Wilfrid Laurier University, Honours Bachelor of Business Administration (BBA)

Volunteer/Community Involvement

  • Big Brothers Big Sisters Association, Big Sister
  • Guelph Ladies Slo-Pitch, President & Treasurer
  • Guelph Minor Hockey – AAA Boys Teams, Treasurer
  • CYO Boys Basketball, Coach
  • Knox Presbyterian Church, Treasurer
  • Kids Can Play Association of Guelph, Treasurer