S&G Consulting Firm, LLC

We have a proven track record of helping minority, women-owned, small, and mid-size businesses achieve profitability by leveraging efficient processes and technology. 

Individual clients and/or households are also an integral part of who we are, we help them achieve their financial and daily life goals and endeavors by providing accurate service customize to their needs.

We help our clients with some of the following:

Our Team

Greyci Martinez, Founder and CEO

Always involved in the success of her community, and its people, in the Plainfield NJ area, mixed with her passion for business and entrepreneurship helped mold her desire to teach in order for others to also succeed. She holds a Bachelor's Degree in Business Administration, an Associate's Degree in Paralegal Studies and is a Quickbooks Certified Proadvisor. Having served the community as a Family Worker/Advocate, she also has a Family Development Certification.

Greyci has over 15 years of experience strengthening small businesses’ financial strategies and bookkeeping practices, as well as helping individuals and their households with legal, financial and social needs. She is a Certified Notary Public, and a translator/interpreter. She has Through her knowledge and expertise, she has contributed to the growth of many businesses in the state of New Jersey.


Sung Soo An, CEO and CFO

His expertise is to crunch numbers and help his clients achieve wealth. He is an expert in business finances, budgeting, forecasting, accounting tools, and taxes, as well as stocks and dividends. He holds a Bachelor's Degree in Economy and another Bachelor's Degree in Business administration and global management. He is a Quickbooks Certified Proadvisor.

SungSoo has over 25 years of experience assessing and strengthening small businesses’ financial strategies and bookkeeping practices through business planning, financial and tax consultancy, and mentorship in South Korea and 10 years of experience in the United States and Latin America. A successful entrepreneur with a proven track record helping minority small business owners and medium enterprises achieve profitability by leveraging efficient processes and technology. Expert in social media, SEO, web and graphic design.