Avis Dillard-Bullock is the Senior Vice President of Program Services for JMA Solutions, retired from the United States Air Force (USAF) after 28 years of outstanding service. 

She has over 20 years of experience in project and program management, leadership, and process improvement.   She directs JMA Solutions' Federal Aviation Administration (FAA), State Department, and other contracts and manages program groups, including more than 135 employees and numerous subcontractors.

Previously, she held strategic-level leadership positions for the United States Air Force as the senior advisor to the Air Force Judge Advocate General, the Air Force Claims Service Center, led a regional office for the USAF Ramstein Air Base, Germany, and served as Operations and Program Manager at USAF Langley.

Dr. Hudson Jackson is a licensed Professional Engineer with over 30 years of consulting, academic, and research experience in geotechnical engineering, structural design, pavement engineering, construction management, field inspections, and construction quality control. He is a Professor of Civil Engineering at the Coast Guard Academy in New London, Connecticut. In this role, he actively participates in the intellectual and professional development of leaders of character within the Coast Guard. With a background in civil engineering consulting, Dr. Jackson also serves as a general advisor and mentor on professional practice issues.

Dr. Jackson has a solid passion for preparing students for the global community, including educating students to become better environmental stewards and encouraging minority students to pursue STEM careers through engineering exposure opportunities.

Susan L. Lang is the founder & CEO of XIL Health, a health analytics and technology company focused on drug pricing economics. XIL Health is a Fortune 5000 fastest-growing company headquartered in the US.

As a healthcare leader, Susan has extensive experience leading complex organizations such as hospitals, medical schools, and pharmacy benefit managers. Before founding XIL Health, Ms. Lang was an officer and C-suite executive for Express Scripts, a Fortune 50 company. During her tenure at Express Scripts, Susan developed complex drug pricing that reduced the cost of medications for millions of consumers.

Before joining Express Scripts, Ms. Lang held multiple executive positions, including the Associate Vice Chancellor for UMASS Medical School, the Vice President of Managed Care and Finance for BJC/Washington University School of Medicine, and a research fellow at WHO in maternal/child health.

Lang has her MBA in finance from Stetson University, an MA in medical anthropology from the University of Memphis, and her BS in marketing from the University of Florida. As a leader in healthcare, she is committed to reducing the cost of care while improving access to care for populations who otherwise cannot afford health services.

Stephanie Salt is an international lawyer and seasoned business executive with more than two decades of experience in multinational, multicultural, multicommodity, and multidisciplinary arenas spanning Africa and the United States. The first American to be admitted to the bar as an Advocate by the High Court of South Africa, Stephanie advises some of the world's most disruptive start-ups in AI, blockchain, cloud, space, and e-commerce.

Before founding Intuitive Diagnostics, Stephanie was on the international USAID team that established the International Financial Service Center in Gaborone, Botswana, currently contributing 9% non-mining revenue to GDP; a consultant with Ernst & Young on the Southern African Development Community (SADC) Project, facilitating billion-dollar market and supply channels for member countries comprising the SADC; head of intellectual property at Altech in South Africa,  increasing shareholder value by uncovering more than R50M of IP assets and IPR rights; Consulting with Vistage Chairs to increase members by over 100%,  by designing and implementing Build Orange County, Build Arizona, Build Colorado Projects; and a visiting professor at the International School of Cooperation in Wuxi China, assisting China's best minds in innovating and building Chinese brands.

Lydia Riddle is a passionate native of Sierra Leone who enjoys giving back in whatever way she can. 

She has held project management roles in Silicon Valley and has been involved in digital transformation in the UK and the US. 

Lydia holds a Bachelor's in Business Administration a Master's in Business Administration, and is a certified Project Management Professional (PMP). 

Chisom Uzosike is a media professional, entrepreneur, and proud member of the Nigerian community. He has been partnered with Develop Africa's Workforce Empowerment program since 2019. He is passionate about culture, innovation, and building unity within the diverse African diaspora.

Chisom is a proud HBCU graduate and an alumnus of Howard University. He studied Public Relations and earned his Master's in Supply Chain Management from the University of Maryland. He aims to create media and tech jobs in West Africa and continue empowering bright minds back home.

Heidi Yewman has spent over 20 years advocating on behalf of trauma victims.

She's directed an award-winning documentary, Behind the Bullet; written a book, Beyond the Bullet; and written numerous articles that illustrate gun trauma's impact on victims and their families.

As a Board member at The Brady Center, Women Donors Network, and the Trauma Intervention Program, Heidi has used her empathy, advocacy, and sensibility to improve boardroom governance, long-term strategy, diversity, equity, and inclusion.

In 2013, Heidi went to Liberia and experienced the trauma its 14-year civil war had on women and families. Following the trip, she helped fund peace-building efforts.

Heidi is a University of Northern Colorado graduate and lives in Portland, Oregon with her husband.

Donor Relations Coordinator

Amy Baty-Herbert has been with Develop Africa since 2013.

She is passionate about making a difference and works with donors to make a meaningful impact in Africa.

She has a BA in Music and business and has over 17 years of experience in customer service, administration, and marketing. She also has over 13 years of experience in the nonprofit sector, handling grants, public relations, donor relations, social media, and fundraising. 

Her favorite part of her job is sharing photos with the donors of smiling students and families in Africa so they can see the positive impact they are making. 

Joseph Kambay graduated from the Milton Margai College of Education and Technology with a Diploma in Business Administration in 2015.

He then started his work career as an IT Assistant / IT Tutor at Develop Africa Sierra Leone. In 2017, he was appointed Program Coordinator of Develop Africa Sierra Leone and later promoted to Program Officer.

He is pursuing a degree in Procurement and Supply at the Institute of Public Administration and Management (IPAM).

Daniel Kamulay holds a BSc in Electronics & Telecommunication and a Higher Diploma in Hardware & Computer Technology. 

As Develop Africa Sierra Leone's IT Officer, he oversees and provides training for students and teachers at the FAWE computer lab. He also supports and maintains the organization's systems, peripherals, and networks. He also provides training at the Juba Hill computer lab.

He previously was an IT Engineer at Niche Technology (AFCOM), where he provided network interconnections and set up and configured complex systems.

He enjoys listening to music/news, reading, traveling, and surfing the Internet.

Tamba Sam completed his secondary school education and is proficient in MS Office applications.

After working in the hospitality industry for a few months, Tamba joined Develop Africa Sierra Leone as an Office Assistant in 2015. 

He supports office operations, computer classes, and program activities.

Ramatulai Mariam Sillah

Ramatulai holds a BSc (Hons) in accounting and is pursuing an MBA in Project Management.  

As Develop Africa's Admin/Finance Assistant, Ramatulai manages miscellaneous financial transactions/accounts and record keeping. She previously worked at Talented Young People Everywhere (TYPE-SL) as an Admin/Finance Manager, MUNAFA Micro Finance Limited as an Accountant, Association for Rural Development (ARD-S/L) as a Finance officer, and GOAL S/L as Finance Officer.

Ramatulai enjoys reciting the Holy Quran, reading, and listening to music.

Johannes Tommy holds diplomas and certificates in Microsoft Office Applications, Computer Applications, Computer Hardware, Networking Electronics, Web Design and Development, and Digital Marketing from Africa Information Technology Holding (AITH), Sierra Leone, Blue Crest College, and Cudoo / LearningOnline. XYZ.

He joined Develop Africa Sierra Leone in 2015 and has provided IT training to hundreds of youths. He also helps manage the IT infrastructure of the organization.