Westford: 978-692-3291 | Marlborough: 508-485-4290

About Turner & Costa, P.C.

Turner & Costa, P.C. is a well-established Northern Massachusetts CPA firm located in Westford and Marlborough with expertise in all facets of financial management, including taxes, accounting, bookkeeping, QuickBooks, business consulting, and much more. We serve a wide range of both business and individual clients throughout Northern Massachusetts and Central Massachusetts including Marlborough, Lowell, Westford, Acton, Chelmsford, Hudson, Groton and Ayer and surrounding communities. Turner & Costa, P.C. is known for our strong commitment to integrity and our policy of tailoring our services to the individual needs of each client.

We offer a free initial consultation. There's no obligation, so give us a call at 978-692-3291 and let's discuss how we can help you meet your financial goals.


Bob Turner

Bob Turner is the President and Managing Partner of Turner & Costa, P.C.. He attended school at Northeastern University and received his Bachelor of Science degree in Accounting. With over 30 years of experience, Bob has provided individual financial, tax, estate investment and small business consultation to a diverse client base.

Bob is a member of the American Institute of Certified Public Accountants and the Massachusetts Society of Certified Public Accountants. Bob is a past President of the Marlborough Rotary Club, and has served for the past ten years as Assistant Treasurer of the Club. He has served on various community-related boards and fundraising committees, volunteered in the Marlborough School System where his sons are attending school, as well as coaching Marlborough Youth Soccer for several years.

Bob resides in Marlborough with his wife and two sons.


Greg Costa

Greg Costa is a Certified Public Accountant (CPA) that has worked for Turner & Costa, PC. (formerly Robert Turner, P.C.) since graduating from college and has been vital to the growth and development of the company. Greg received his B.S. from St. Anselm's College in 2002 as an accounting major. In 2009, Greg earned his Certified Public Accounting license and has a vast range of experience in all aspects of individual and corporate accounting matters, and works closely with a diverse client base.  He resides in Northborough, MA with his wife and two daughters.


Jesse Hancock

Jesse interned at Turner & Costa, P.C. for two years while completing her undergraduate studies, and she joined the firm as a full-time employee in 2017 after earning a BSBA with an Accounting concentration from the University of Massachusetts Lowell. She looks forward to expanding her knowledge of taxation and accounting at the firm while preparing personal and corporate tax returns and providing bookkeeping services. Currently, she is pursuing an MBA with an Accounting concentration with plans to sit for the CPA exam upon completion.


Rachel Gillis

Rachel Gillis started at Turner & Costa, P.C. as an intern from the University of Massachusetts Lowell. After graduating in 2017 with a B.S. in B.A. with a concentration in Accounting, she has continued working at the firm preparing tax returns, providing bookkeeping services, and working on corporate clients. Rachel has passed the CPA Exam and plans to pursue a master’s degree in 2019, and she hopes to continue to learn and grow in this profession.


Brenda J Greenwood

Brenda joined the team in 2012 and is the first point of contact for the Westford office. She has over 25 years’ experience as an administrative professional supporting and managing business operations. Her attention to detail and communication with our clients enables us to effectively work in a fast-paced environment and with highly confidential data. Brenda emphasizes the importance of developing client relationships and assisting them, and is vital to our success. She resides in Pepperell with her husband and two pups, and loves to cook, read, and spend time with her family.