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Board of Directors

Lee Machen

Founder/Board of Directors

Lee has been in the financial services industry since 1992 working with professionals, executives and business owners. 

His prior career was with Unisys Corporation where he served in various management roles including software products and services, quality assurance, and project management.

With his extensive background in financial services, Lee took the initiative to become a leader in the Gwinnett Community when he founded the Gwinnett Leadership Forum in 2013.

Lee holds an undergraduate degree in mathematics/chemistry, and a Master’s degree in Theology. He is married to Renee and has two daughters and three grandchildren.

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Clint Thompson

Chairman of the Board

Clint has 30 years of experience building start-up organizations, raising capital and selling businesses in the agriculture, clean energy, environmental and real estate industries. In addition, to his business planning and implementation experience for start-up organizations, Clint has developed National and International Programs for some of the largest organizations in the world. 

He is known for developing first of kind programs and first to market organizations. Prior to starting his own company in 1999, Clint culminated a 10- year career managing a 100 person organization for an international environmental sustainability company. Clint graduated from the University of Alabama with a B.S. Degree in Environmental Studies. 


Ryan Jones

Board of Directors

Ryan Jones currently serves as Director of Community Development for Neighborhood Cooperative Ministries. After spending 15 years in the banking industry providing support to Georgia companies of various sizes,  Ryan decided to pursue his passion for serving others full time by helping families in crisis in Southwest Gwinnett County. 

In the community, Ryan serves as the Director of the Pantry @ HMUMC, a food pantry serving an average of 400 families every week. Ryan is the service chair for the Duluth Rotary Club, an advisory board member for the Path Project, and a mentor for Gwinnett County Schools community-based mentoring program. Ryan is married to Loni, a first-grade teacher, and has two young boys Hudson and Grayson. 

Christie Sims

Board of Directors

Christie Sims has been a business owner in Gwinnett County for 25 years. 

She is Vice President of Hussey Gay Bell’s Atlanta office. HGB is a multidisciplined firm, offering civil and environmental engineering, surveying, land planning, architecture and transportation. The firm began in Gwinnett County over 63 years ago and Christie has been a part of it for over 30 years. Christie graduated from North Carolina State University with a B.S. degree in Landscape Horticulture.  She is a registered Landscape Architect in Georgia

and North Carolina and continues to use that expertise at the firm as well as her role in project management and business development.  Christie also oversees many of the firms’ park designs, residential design through construction, commercial/industrial projects and handles environmental impact issues for all projects.

Christie holds several industry related certifications including those from the

USACE Wetlands Training Institute, the NC Stream Restoration Institute, the Georgia Soil and Water Conservation Commission and completed the Georgia Academy of Economic Development certification course.

She is actively involved in various community organizations including the

Greater Hall County Chamber of Commerce, Gwinnett County Chamber of

Commerce and the Forsyth Chamber of Commerce.  Christie has been on the Board of Directors of The Council for Quality Growth, a pro-business organization, for over 20 years.

Christie is heavily involved with Redwine Methodist Church and is a standing member of the trustee board there.


Daniel Sosebee

Board of Directors

Daniel is an associate member in MSTiller's Gwinnett office. He specializes in assurance and attestation services for closely held businesses and not-for-profit organizations. His expertise includes a variety of industries such as distribution, manufacturing, construction, technology and dealerships, as well as serving on a number of significant non-profit engagements, including our largest private foundation clients.

In addition to assurance and attest engagements, Daniel is passionate about building relationships with colleagues, clients, prospects and networking within the communities we serve. This passion has led Daniel to the position of Director of Business Development where his role is to lead the Firm through organic growth, mergers and acquisitions as well as develop new lines of business. 

Secondly, he oversees the Firm’s employee retention and recruiting department in which he works hand-in-hand with the Firm’s retention and recruiting specialist.

Daniel obtained his BBA in Accounting from Georgia College and State University (where he also was a member of the men’s golf team) and completed his Master of Accountancy at Kennesaw State University.

Daniel is a member of the Georgia Society of Certified Public Accountants and American Institute of Certified Public Accountants and is actively involved with his church and community affairs including the Gwinnett Chamber of Commerce, Gwinnett Chairman’s Club, Partnership of Gwinnett and board member of the Gwinnett Leadership Forum and the Hudgens Center for Art and Learning.


Kimani Mustafa

Board of Directors

Kimani Mustafa is part of JLL’s Industrial Services Group that integrates his supply chain insights and his passion for serving others to add tremendous value to the team. He is responsible for initiating

strategic business relationships and cultivating both new and existing clientele. He leverages industry and market specific information to position both his team and clients for success.

Prior to joining the Industrial Advisory Group, Kimani worked with JLL’s Retail brokerage team and assisted with many major projects such as the Halcyon & Summerhill developments. He also has a

background in construction management as both a multifamily and residential project manager.

With JLL, Kimani has had the opportunity to make an impact by assisting major clients with real estate & supply chain strategy such as UPS, Fortune Brands, Lowe’s, Piedmont Hospital, and many other

startups to Fortune 100 corporations.

He received national acclaim by JLL and was one of two recognized for the “Industrial Extra Mile Award” for his efforts.


Kimani graduated with a Bachelor’s in Business Administration in Management with a Management Information Systems and Logistics minor. He was awarded as the Top Volunteer in his graduating class With over 2200 registered volunteer hours. Now he is affiliated with the Atlanta Commercial Board of Realtors, Gwinnett Chamber of Commerce, CBMC, and several other volunteer organizations within Atlanta.

Kimani enjoys new adventures and challenges, traveling, cycling, event planning, and he recently completed a half-ironman triathlon.

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