Wormald Masse Keen Lopinski LLP

344 Lake St
St. Catharines, ON
L2N 4H4

About Us


Wormald Masse Keen Lopinski LLP was first established in 1977 in a small office building in downtown St. Catharines. In 1992, the firm purchased the building where it is currently located at 344 Lake Street in north St. Catharines. Since then, WMKL has developed a staff of over 65 knowledgeable and dedicated professionals.

Our knowledgeable and dedicated staff are committed to providing excellence in delivering the following services to a variety of client groups including retail, manufacturing, service, professional, agribusiness, construction and not for profit:

  • Audit & Assurance
  • Bookkeeping & Data Processing
  • Business Advisory Services
  • Payroll Administration
  • IT Consulting Services
  • Estate and Retirement Planning
  • Tax Advisory, Filing, Compliance, Planning & Preparation

We are proud of our long history of service and the experience we have garnered which allows us to provide the trusted business advice that our clients can rely upon.

Our People


Al Jovaisas
CPA, CA, Partner
Category: Accounting Services
Angie Greenwood
CPA, CA, Partner
Category: Accounting Services
Art Lopinski
CPA, CA, Partner
Category: Accounting Services
Bill Keen
CPA, CA, CFP, Partner
Category: Accounting Services
Dan DiGirolamo
CPA, CA, Partner
Category: Accounting Services
Greg de Prinse
CPA, CA, Partner
Category: Accounting Services
Kelly Twerdy
Office Manager
Kevin Burtch
CPA, CA, Partner
Category: Accounting Services
Larry Wormald
CPA, CA, Partner
Category: Accounting Services
Larry Masse
CPA, CA, CFP, Partner
Category: Accounting Services
Mitch Berard
CPA, CGA, Senior Associate
Category: Accounting Services
Steve Sakes
CPA, CA, Partner
Category: Accounting Services
Todd Zavitz
CPA, CA, Partner
Category: Accounting Services

Other Details