Our team

NOTS Netherlands

Bart Hartman
Bart Hartman, Founder & CEO

Bart Hartman is the founder of NOTS Solar Lamps. He started his career as a consultant with McKinsey & Company and then worked as an entrepreneur, transforming and building about 15 businesses, including a successful over-the-counter medical products company. Bart holds an MBA from INSEAD.

Email: bart.hartman@nots.nl

Bas Maassen
Bas Maassen, CFO

Bas worked for 5 years in management consultancy, 12 years in banking, 13 years in private equity and now for 4 years as entrepreneur and (non-executive) board member at various companies and NGO’s. In relation to Africa, Bas is chairman of the supervisory board of Amref Flying Doctors and board member of DOB equity (Dutch impact investor in East Africa). Bas has a masters degree in econometrics.

Email: bas.maassen@nots.nl

Roland Tabor
Roland Tabor, Chief Marketing and Data Officer

Roland is an experienced CMO in the Retail and online areas. In the last 4 years Roland worked as a partner of the Data Analytics agency MIcompany. Roland started his career at McKinsey & Company, after obtaining his PhD in Chemistry.

Email: roland.tabor@nots.nl

Miguel Stief
Miguel Stief, Chief Manufacturing & Supply Chain Officer

Miguel, a Brazilian national, has a MBA from Toronto University and Bachelors in Electronic Engineering from FEI University and Business Administration from University of Sao Paulo. During the past 28 years he worked in CEO, Global Business Development Director and Senior VP positions in Philips (USA), NXP Semiconductors (Germany), LiteOn (China) and Positivo BGH (Argentina).

Email: miguel.stief@nots.nl

Martin Bauman
Martin Bauman, Controller

Martin Bauman has worked for 40 years as auditor with PWC in The Netherlands, the last 19 years as partner. His auditing activities  focused on NGO’s, social enterprises, education institutions and SME’s. He was founder and leader of the NGO-practice of PWC in The Netherlands. Since 2017 he has his own firm for advising NGO’s and social enterprises on finance and control related issues.

Email: martin.bauman@nots.nl

NOTS Rwanda

Solange Mutezintare
Solange Mutezintare, Acting Country Manager - Rwanda

Solange is an accomplished program developer and manager with 12 years of experience in strategic, financial and administration management. Prior to joining NOTS Solar Lamps Ltd., Solange served as the Education Development Center Inc. (EDC) Deputy Chief of Party for a $ 25 million large-scale literacy and numeracy USAID funded project. 

Email: solange.mutezintare@notsrwanda.com

Issa Karamage
Issa Karamage, Sales Director

Business leader with over 20 years’ experience in the public and private sector in Rwanda. Issa holds a master’s degree in Communication Management and a bachelor’s degree in Finance & IT from the University of Rwanda. Issa is founder and CEO of Fidelity Resilient, a consultancy firm focused on advising non-African firms on entering African markets.

Email: issa.karamage@notsrwanda.com

Audace Mucyo
Audace Mucyo, Marketing Coordinator - Rwanda

Audace has 6 years of marketing and sales experience in several industries, including telecom and solar. He attended the Rwanda University of Tourism Technology and Business and graduated with a bachelor’s degree in Business Management. 

Ritha Muhorakeye
Ritha Muhorakeye, Finance and Administrative Officer - Rwanda

Ritha, prior to joining NOTS Solar Lamps Ltd., was the Finance and Administrative officer for 5 years for a USAID funded project. In this role she oversaw the financial and administrative operations of the project. She holds a bachelor's degree in accounting from Kigali Independent University.  

Email:  ritha.muhorakeye@notsrwanda.com

David Kubwimana
David Kubwimana, Senior Data Engineer

David holds a master in data engineering and is an IT PhD Candidate at Jomo Kenyatta University of Agriculture and Technology. He has 10 years of experience in eliciting, analyzing and documenting the requirements for business processes and data engineering. In several assignments he worked as a liaison among business stakeholders to understand business issues and develop appropriate solutions.  


Email: david.kubwimana@notsrwanda.com

Board members

Eric Rahusen
Eric Rahusen

Has had a 27 year career in Investment and commercial  Banking in the Netherlands. He currently holds a number of advisory position with Dutch family offices and Dutch foundations. He is the co-owner of “Saar aan Huis” a company which renders care services for the elderly.  

Paul Bijleveld
Paul Bijleveld

Paul is a Managing Director at Aké Partners, a corporate advisory firm active in sub-Saharan Africa with local representation in Lagos, Nairobi, Abidjan and Johannesburg. He has 25 years of investment banking experience with Morgan Stanley, Barclays, UBS and ABN Amro and was head of African Investment Banking for Barclays/Absa Capital in Johannesburg.