Mark G. DeVine
CPA, CGMA
Mark G. DeVine, CPA, CGMA, graduated from Roger Williams College in 1982 with a B.S. in Management and then earned a B.S. from RWU in 1994 with a degree in Accountancy. He has been in the tax and accounting field since 1989. He started out in banking, then worked as a Tax Accountant at the Fleet Private Clients Group, preparing personal tax returns for trust clients. He was a Tax Supervisor at the international accounting firm of KPMG and prepared tax returns for trusts and estates. He was a Senior Staff Accountant at Kieliszak, Eggert & Co. doing financial statement audits, and preparing financial statements and tax returns for small and medium sized businesses and high net worth individuals.
He became a CPA in 2000 and worked as a Partnership Staff Accountant for Nautic Partners, a private equity and venture capital firm in Providence before starting his own accounting practice in 2003.
He is on the Board of the East Bay Chamber of Commerce and was Past Chairman, he is also Treasurer of SCORE, a volunteer counseling service to entrepreneurs under the SBA. He is on the Leadership Team of Priority One Foundation in New England, a Christian men’s discipleship ministry.
He lives in Bristol with his wife, and has a son, daughter-in-law and a grandson.
John J. Grayko, III
Business Operations and Client Service Manager
John joined DeVine & Associates in 2025. Prior to joining our team, he managed all operational functions and staff members for the largest Self Storage Facility on Aquidneck Island.
As a former small business owner, and General Manager of a 1,500-unit self-storage facility, John brings a great mix of operational management background. Throughout his career he’s experienced successes in improving business efficiencies and growth and mentored many employees to be their best. He embraces the approach to “Never Stop Looking to Improve” and welcomes the challenges of developing the best ways to do so here at DeVine & Associates.
He graduated from Marshall University with a BA in Criminal Justice and lives in Newport, RI with his wife and twin daughters.
Elizabeth L. Costa
Senior Staff Accountant
Beth joined DeVine & Associates in 2015 and has been in the tax and accounting profession since 2004. Before joining our team, she worked with area CPA firms and local businesses, providing bookkeeping and accounting services.
She is a graduate of the Katherine Gibbs Business School and Ashworth College, where she obtained her Tax Preparation Certificate.
In addition to providing accounting and payroll services to our for-profit and non-profit clients, Beth provides QuickBooks training and support and works on special accounting projects for the firm. She is a RI Notary Public and a Certified QuickBooks ProAdvisor.
Beth has been the Treasurer of the East Providence Jr. Townies Board of Directors and Fundraising Coordinator of the Riverside Raiders Board of Directors.
She is married and has four children.
Joseph E. Groff
Staff Accountant
Joe joined DeVine & Associates in 2021. Prior to joining our team, he spent a few years in retail and marketing, with experience in various business types. He also worked for another accounting firm while earning his college degree. He graduated Summa Cum Laude from Rhode Island College with a Bachelor’s degree in Accounting, and has an Associate’s degree in Marketing.
Joe provides accounting, tax, bookkeeping and payroll services to our individual and for-profit and non-profit business clients.
He enjoys helping clients and continuously learning and growing in the tax and accounting field.
Elizabeth DeVine
Bookkeeper
Elizabeth joined DeVine & Associates in 2017. Prior to joining our team, she was the Assistant Manager at a local gym. She has several years of experience providing excellent customer service to the public in various roles.
Liz provides personalized bookkeeping and payroll services to our for-profit and non-profit business clients.
She is married and has one son.
Nayaly Benavidez Hernandez
Nayaly possesses a diverse background in administrative support and customer service. Her professional experience includes serving as an Administrative Assistant at a Section 8 affordable housing facility for older adults and individuals with disabilities, where she provided essential support to the Housing Choice Voucher Program.
She also worked as a Shift Advisor with the Department of Homeless Services, assisting community associates in welcoming and engaging migrant and asylum-seeking residents. In addition, Nayaly has previously held the position of Bilingual Assistant for an on-demand healthcare platform, Docgo, ensuring effective healthcare delivery to diverse populations.
She served as a College Assistant in the Graduate Admissions Office at Lehman College, CUNY, which afforded her the opportunity to engage with prospective students and support their educational journeys.
Nayaly provides customer service support for our clients, such as scheduling appointments, providing documents and answering a myriad of questions. She also provides support to our professional staff in many different ways.
She is married and has a daughter. In her leisure time, Nayaly enjoys crafting and creating artwork. She is fluent in English and Spanish.
