Cliff Bray

Cliff Bray


(678) 240-2620

Cliff is a partner with the firm of WMBO CPA Group, LLC. With over 22 years of experience, he has been providing financial, accounting and tax services to individuals and numerous closely-held small and large businesses. He has experience with a wide range of businesses and professions, including: manufacturing, contractors, wholesale and retail operations, attorneys and other professionals.

Cliff received his Bachelors of Business Administration in Accounting from the University of Georgia. He is a member of the Georgia Society of CPAs and the American Institute of Certified Public Accountants. He is very active in his community and devotes time to a number of charitable organizations. Cliff is currently on the board of the Community Foundation for Northeast Georgia and an active member of Leadership Gwinnett. He is the Past-President, Treasurer, and Executive Committee Member of Hi-Hope Service Center; and Past-Treasurer for Rainbow Village. He is also a member of Gwinnett Mosaic Rotary and Duluth Civitan International.

James Marosek

James Marosek


(678) 240-2607

James D. Marosek, Jr., CPA has over twenty years of experience serving small businesses and individual clients. James has a passion for helping individuals and business owners succeed by ensuring they have timely and accurate financial information that they can understand, planning consistent with their life goals, and a solid team of professionals serving their best interest. He earned his Bachelor of Business Administration from Cleveland State University and is a Certified Public Accountant in Georgia and Ohio. James is an active member of the Georgia Society of Public Accountants. He is the Treasurer of Rotary District 6900 and serves on the board of a non-profit – Stride Ahead. James and his wife Van are avid supporters of our veterans and donate their time to supporting veterans causes. James and his wife have three daughters. He enjoys spending time with his family, mountain biking, golf and tennis.

Mark R. McGrath

Mark R. McGrath


(678) 240-2600

Mark R. McGrath is a tax partner with more than 39 years experience in public accounting.  Mark’s experience includes strategic tax planning, preparation and consulting for individuals, estates, corporations and partnerships.  His clients include small to medium size businesses including medical practices, general & specialty contractors, real estate developers & investors, manufacturers, hospitality, professional service providers and individuals.

In addition to providing tax service to his clients, Mark consults with clients on various business matters including business valuations, buying and selling businesses, key employee incentives and has extensive experience in management consulting.  He has been instrumental in assessing his client’s needs, developing solutions to meet and exceed those needs and oversee the implementation of the plan, for the benefit of the client.

Mark was the founding partner of Westbrook, McGrath, Bridges, Orth & Bray which is now known as WMBO CPA Group.

Mark is a member of the American Institute of Certified Public Accountants Tax Section and is licensed in the State of Georgia.

Mark obtained his Bachelor degree in Accounting from Moravian College and post bachelor work at Mercer University.  Mark serves on the Board of Gwinnett Childrens’ Shelter Home of Hope.

Kris Stone


(678) 240-2629

Education: BBA in Accounting from the University of Georgia

Pablo Castanon


(678) 240-2622

Pablo Castanon is a tax partner with more than 15 years of experience in public accounting.  He has experience providing tax services and financial advice to individuals, corporate executives, family business owners, and high-net-worth clients on income tax, estate and gift tax, investment, and retirement planning.

Before joining WMBO CPA Group, LLC, he worked for the Atlanta office of PricewaterhouseCoopers, LLP and Bennett Thrasher, LLP, in the Personal Financial Services Practice. He also served as the Treasurer for the Corporate Volunteer Council of Atlanta.

Pablo obtained his bachelor’s degree in accounting from Lindsey Wilson College and a master’s in taxation from Georgia State University and William Howard Taft University.

Pablo is a Certified Public Accountant (CPA) licensed in Georgia and a Certified Financial Planner (CFP®).

Tanya Christensen


(678) 240-2605

Tanya Densmore Christensen attended Auburn University where she earned a Bachelor’s degree in Business Administration.  Tanya began her public accounting career as a staff accountant.  Following her public accounting experience, she moved into the private accounting industry and held positions including Controller as well as Vice President and Treasurer for more than ten years.  For approximately another ten years, Tanya worked both as an employee and contractor in order to afford her the flexibility to be a stay-at-home mom with her son.  She maintained a small accounting/tax practice while managing and working closely with accounting, administrative, human resources and purchasing departments throughout her career.

Tanya has worked in the field of accounting for more than 30 years and recently joined WMBO CPA Group as Partner.  She is an active member of the Georgia Society of CPAs as well as the American Institute of CPAs.

When away from work, Tanya first and foremost enjoys spending time with her two grandbabies.  Other interests include music, snow skiing and most kinds of exercise.  Tanya is a native Atlantan, and her family is a rarity, going back as far as nine generations from Atlanta, GA.