Growth is not valuable if it’s ‘here today and gone tomorrow.’ Our advice does not rely on schemes or unproven techniques. Our accountants take the time to understand your needs, apply our professional capabilities, and then provide you with meaningful advice that will enhance your financial position today and tomorrow. MDP combines the knowledge and experience of a large accounting firm with the personal attention and availability you appreciate from a hands-on entrepreneurial firm. Request a consultation today.


Our accounting firm delivers comprehensive business solutions and accounting services to companies across a dozen different industries in Ontario. We also provide private client services to select clientele.

Audit & Assurance

Accounting and financial reporting, forecasting, budgeting, cash flow, corporate governance, benefit plans & 3rd party attestation.

Audit & Assurance Services

Business Advisory

Corporate finance, succession planning, mergers & acquisitions, valuation, analytics, outsourced CEO & business consulting, and various other advisory services.

Business Advisory Services


Planning & preparation, Canadian corporate tax, US tax, employment & payroll, research & development tax credits.

Tax Services

Private Client

Personal tax planning, investment accounting, tax returns, wealth advisory, estates, trusts, & personal/corporate holding integration.

Private Client Services

Chartered professional accounting and tax services to businesses and private clients in Southern Ontario.

Our Clients

MDP supports a wide-range of businesses and select private clients in Ontario including corporations, business owners, corporate shareholders, high net-worth individuals, professionals, unions, & not-for-profits.

Who We Work With

Industries Served

Our firm has extensive experience working within over a dozen difference industries including healthcare, real estate, construction, manufacturing, hospitality, automotive, distribution, retail, energy, & more.

Industry-Specific Accounting

Financial Resources

We provide a list of free resources and offer a quarterly newsletter that advises on tax legislation, regulations, tips, & other timely topics that can advance your business or personal financial success.

Free Resources

MDP accounting firm has served clients in Mississauga, Toronto, Hamilton, Oakville, Hamilton since 1992
The MDP Accounting Firm - EST. 1992
Serving Clients in Mississauga, Oakville, Burlington, Hamilton, the Greater Toronto Area, & across Southern Ontario

MDP LLP Chartered Professional Accountants was established in 1992. Formerly known as Martyn, Dooley, & Partners, our firm is located in Oakville, with offices in Mississauga, Hamilton, and clients throughout the Greater Toronto Area and across Southern Ontario.

We employ over 35 professionals across a magnitude of backgrounds. Our team is comprised of Engagement Partners supported by Consulting Partners, many of whom have obtained their training and experience from two long-established national/international accounting firms.