Management Team


tuvuga’s management team’s diverse backgrounds have given the organization a unique global perspective. Hailing from the United States, Africa and Asia, with working experiences spanning the globe and multiple industries, tuvuga benefits from their deep understanding of different social and work cultures, which in turn benefits the design of the tuvuga platform experience. 


George Deren

Chief Executive Officer – Founder

George Deren, founder and CEO of SentryBlue Group Inc., the parent company, leads in driving the organizational vision. George comes with extensive experience in corporate and non-profit corporations, a Fortune 20 company and start-ups in entrepreneurial environments, is an attorney and businessman, and has enjoyed a successful track record in sales, consulting, marketing, management and business development. George’s most notable career highlights are Deputy General Counsel for Bedford Stuyvesant Development and Services Corporation, founded by Robert Kennedy in 1966 and President of Dakin Street Corporation in partnership with Thomas W. Keesee, former CEO of Bessemer Securities and Chairman of the Executive Committee of ITT. 

George gained substantial international experience traveling and developing relationships in all Europe, parts of the Middle East, Venezuela and Hong Kong. George also served as Regional Director of Sales and Consulting for Johnson & Johnson Health Management, Inc., a newly formed J & J company, which designed and managed health improvement programs for the Fortune 100. He was subsequently appointed National Director of Sales and Consulting for JJHMI. He played a primary role in designing the consulting process known as the "Tactical Plan" which required working with every level of the corporate structure from senior management to human resources to operations staff. Mr. Deren subsequently accepted an offer to return to New York as one of four Managing Directors of Decision Strategies, an international security, investigations and crisis management firm founded by a former senior officer of Kroll Associates specializing in international work.

Anna Victoria Chavez

Executive Vice President SentryBlue Group / Chief Platform Officer tuvuga – Founder

Anna manages the everyday operations of tuvuga Group and its internal team relationships. Anna is integral in creative design and marketing, social media and content as well as oversees product quality and deployment. Anna has worked in the HealthCare industry for over 30 years, most notably with the Sun HealthCare Group/ACP as a Divisional Vice President for sales, marketing, education and quality assurance, responsible for $10.8 Million in annual revenues. She assisted in developing the ACP (Accelerated Care Plus) division of Sun incorporating high tech solutions with over 1000 lecture hours to therapists, nursing and physicians in electrophysiology and customer care to surpass industry standards for efficiency, productivity and quality assurance. 

Anna then went on to work for 170 Systems (Oracle/SAP Advantage Partner) in Cambridge, MA. As their Director of National and International Client Education for Fortune 500 companies in the U.S., Australia, Ireland, Amsterdam and the UK, she spearheaded their computer based training for a paper-less workflow business process, developing their custom client training documents and end-user support. Most recently, Anna held the position at EnduraCare Therapy Management as a Regional Vice President in therapy outsource programs and as Chief Technology Officer liaison to regional field staff assisting in computer based training and technical solutions toward efficiency and productivity models.

John Rooff

Chief Technology Officer – Co-Founder

John comes to tuvuga Group as Vice President of Technology focusing on web and application services and corporate information technology. John graduated with a BS and MS in Aerospace Engineering from the University of Notre Dame and Georgia Institute of Technology, respectively. John's career began at Andersen Consulting working in one of their emerging technologies groups. Within the Andersen organization, John worked on projects for telecom companies coordinating release management for a custom software package and managing client desktop software company-wide. John joined 170 Systems (now Kofax Inc.) in 1998 in the early growth phase. 170 Systems was a Cambridge, MA based company providing business process automation software to clients looking to lower operating costs by introducing a paperless environment with a focus on clients with $1 Billion+ in annual revenues with 30%-40% Fortune 500 / Global 1000 clients. John was a key contributor in the company's growth from startup until acquisition by Kofax in 2009.

While at 170 Systems, John had roles as a lead consultant, senior consultant, technical architect, and project manager for teams providing software configuration and custom development to maximize value for each client and also as a proficient developer of client custom applications and software products. He started the company's first foreign office in the United Kingdom running day-to-day consulting and account management in London for 2 years. During his final 2 years, John was responsible for account relationships and professional services sales and contracts for approximately 35 US clients in the West and Southwest as well as for leading select critical internal projects.

Loic Assobmo

Executive Director for Initiatives in Africa and Founder GEMA a.k.a tuGEMA

Loic's career began as an Intern for the Robert R. Taylor Network Inc. (RRTN), a nonprofit organization based out of MIT. Within the organization, Loic moved from Intern to Chief of Ventures within 4 years, where he worked with global partners such as IBM Lotus and MIT to implement the company’s Global Node Network for providing technology and technology literacy to underserved communities in the Caribbean and Africa. Loic led the development of 9 technology labs at universities, schools, and community centers in the Caribbean and Africa. Loic also co-authored 6 grant proposals ranging from $30, 000 – $1.2 Million, with MIT Professors as PIs of which two were awarded, ie IBM Shared University Research Grant, IBM Open Collaboration Research grant, MIT International Science and Technology Initiatives, and City of Brockton / Brockton Public Schools.

In 2013, Loic went on to incorporate, the Global Enterprise for Medical Advancement (GEMA), a nonprofit organization based in Massachusetts, whose mission is to bring cognizance and solutions to African healthcare issues. Through GEMA, Loic received letterhead invitations from African District Hospitals and travelled to Cameroon in order to volunteer with 6 doctors at 2 district and private hospitals while assessing local public health practice and needs. (District Hospital of Dschang & Riverside Medical Center). As a result, Loic developed a strategy for implementing World Health Organization (WHO) disease prevention suggestions in Cameroon. GEMA reached several Cameroonians through a 3-month intensive public health education and disease prevention campaign via public service announcements broadcasted on local TV stations 3 times a day. Loic continues to further the mission of GEMA through strategic initiatives aimed at creating long-lasting impact on the continent of Africa.

Loic graduated with a Masters of Science in Nursing at Boston College 2017. He also graduated with a Bachelors of Science in Biology, Concentration in Pre-medicine, and Minor in Philosophy at Boston College in 2015. Loic is currently also a practicing Nurse Practitioner who provides primary care to adults and geriatric patients in an underserved community.  

Paulette Ngachoko

tuvuga Senior Advisor for International Legal and Business Affairs 

Paulette Ngachoko has been a member of the Board of Directors of IIJD since its creation. She has provided technical assistance for the incorporation of the Organization and the design of programs. Along with her involvement with IIJD, she has worked as Compliance Risk Manager for Bank of America since November 2000. Prior to that Mrs. Ngachoko worked on different projects as Financial Analyst for Boston Financial Data Services, E*Trade and Prudential Insurance from 1997 to 1999.

Paulette Ngachoko came to the United States in 1997. While living in Burkina Faso from 1993, she finished her law studies and subsequently worked as an Attorney. In July 1995, through her affiliation with CAPIA, a Burkina Faso government organization to promote African integration, she participated with the country’s delegation to the world youth summit conference in Yamoussoukro, Ivory Coast. Mrs. Ngachoko left her native Cameroon in 1993, after contributing to its people’s fight for freedom and democracy through the National Coordination of Cameroonian Students and FREEDOM-NOW, a National Organization of Women whose goal was to promote women's opinion and encourage their participation in political forums.

Paulette's educational background includes: an LL.M. in International Banking and Financial Law from Boston University in May 2000; a D.E.S.S. (post-graduate degree) in International Business Law, a Master's degree in Law from Ouagadougou University in Burkina Faso, and a Bachelor's degree in private law from Yaoundé University in Cameroon. Paulette Ngachoko speaks French fluently and has been member of the New York State Bar Association and the American Bar Association since 2001. 

Yvette Beltran

Vice President of Marketing and Communications

Yvette develops tuvuga’s marketing strategies, brand communications and partner/sponsor promotion ideas. With almost 20 years in both international and boutique ad agencies in Asia and USA, Yvette is an experienced marketer with strategic planning capabilities, proven brand and budget stewardship, tenacious project management skills, and drive for process improvements and expansion opportunities. Her diverse portfolio included consumer, B2B, technology, airlines, consumer packaged goods, petrochemical, and automotive categories as well as global and multicultural assignments. Her clients included Microsoft, American Airlines, Coca-Cola, Shell and Audi, with advertiser annual budgets ranging from $100 thousand to over $100 million, reflecting her ability and agility to customize campaigns effectively to marketing goals and needs  which benefit from her almost 20 years of advertising in Malaysia and the USA. She has been at multinational agencies such as McCann Erickson, DDB, JWT and Saatchi & Saatchi, as well as US-based agencies in San Francisco, Dallas, Cincinnati and Santa Barbara. 


Michael Turner

Executive Director of Innovation and Communication Strategies

Michael Turner leads tuvuga in the development, design and functionality of the Millennial YZ Platform. A recent graduate with a Master’s degree in Global Marketing Communication and Advertising from Emerson College, and an Undergraduate degree in English and Professional Writing from Endicott College, he has worked predominantly with Minority Businesses while previously employed with the Tuck School of Business at Dartmouth College, The Greater New England Minority Supplier Development Council and his various volunteering and side projects geared towards youth education and financial literacy. 

William Miller

General Counsel

William F. Miller is a Partner with Pannone Lopes Devereaux & West LLC and a member of the Corporate & Business Law Team. He is a highly skilled attorney with more than 30 years of experience who focuses his practice on corporate and business law matters, including mergers and acquisitions, angel, venture capital and private equity financing, commercial contract matters, intellectual property protection and licensing, and entity and investment fund formation.