Our Professional Accounting Staff

Mervyn A. Fonseca, CPA, CA

Chartered Professional Accountant

Mervyn graduated from the University of Toronto in 1998 with a Bachelor of Commerce degree and obtained his CA designation in 2002 while articling with KPMG LLP. During his time with KPMG LLP, he worked on a broad variety of clients and gained knowledge in manufacturing, insurance, consumer products, healthcare, service industries and non-profit organizations. Mervyn left public practice in 2003 and worked in the private sector until 2010 in owner managed businesses in which he held the position of Vice President, Finance and Chief Financial Officer.

Mervyn decided to return to public practice in 2011 by acquiring an accounting practice in Milton, Ontario from an accountant who was looking to retire after practicing for over 20 years. Mervyn's success has been derived from the personal care and attention he provides each client, tailoring customized financial and taxation plans that are sensitive to each client’s individual needs. His experience from working on the "other side" in industry has definitely been an asset in understanding the challenges and issues faced by business owners in today's environment.

Outside of the office, Mervyn enjoys playing sports, working out and is an avid runner. Mervyn is also busy raising his two beautiful children.


Lynn Jagessar-Fonseca, CPA, CMA

Chartered Professional Accountant

Lynn graduated from the University of Toronto with a Bachelor of Commerce degree in 1999 and obtained her CMA designation in 2001. She has been exposed to various industries and worked for owner managed and public companies. She has been responsible for the completion and analysis of internal and external reporting with a stong emphasis on financial planning.

She is passionate about her work and enjoys dealing with business clients and individuals in all facets of accounting and business planning. Lynn is able to work side by side with clients to help them understand how to use their accounting software accurately, but more importantly how to best manage finances efficiently and effectively.

She has been a resident of Milton, Ontario for the past 10 years. When she is not running after her two kids, she enjoys running outside in the fresh air.


Katie Coates

Staff Accountant

Katie is born and raised in Milton and vows never to leave the small town. Enrolling in numerous business courses through high school sparked her interest to pursue a career in Accounting. After obtaining her Buisness Administration-Accounting Diploma from Sheridan College, she obtained an entry level position with a small Milton firm in 2008.

She has gained an exemplary knowledge of bookkeeping and is experienced with a variety of accounting softwares. She is planning to complete her Business degree in the near future.

When not found busily working at her desk, Katie enjoys attending concerts, catching up on HBO, and avidly walking her Labrador Gatsby.


Lakesia Dennis

Staff Accountant

Lakesia graduated from Sheridan College with Honors in Business Administration-Accounting Diploma. She is currently completing her Bachelor of Commerce degree. 

She always had a passion for accounting and building a strong relationship with clients. With experience in both corporate and personal tax, Lakesia is able to assist in ensuring that all the client's needs are met.

She enjoys spending time with her family, friends, and has a strong passion for music.


Manda Dave

Staff Accountant

Manda joined Fonseca & Fonseca in January 2016. She is currently working towards her CPA designation and has earned an Honors Master of Commerce degree from Gujarat University. In her spare time, Manda enjoys traveling and listening to music.


Melissa Quartarone

Office manager

Melissa joined Fonseca & Fonseca in January of 2015. While organizing and performing the day-to-day administrative duties, Melisa takes pride and care in establishing a friendly and professional rapport with our clients. When not at work, Melissa likes to be physically active, go shopping, and hang out with friends and family.


Morgan Chu

Co-op Student

Morgan joined Fonseca & Fonseca in January of 2016 as a coop student. He is currently in the Mathematics/Chartered Professional Accountancy program at the University of Waterloo and will be pursuing his CPA designation in the future. In his spare time, Morgan enjoys cooking and hanging out with friends.