Senior Leadership


Dan Knox

Group Chief Executive Officer

Mr. Knox brings more than 12 years of experience in telecom network hardware & services. Mr. Knox has led successful execution of contracts for maintenance, support and expansion of telecom networks in some of the world’s most challenging emerging markets. He currently leads GSM Systems’ ongoing expansion across 3 continents, with a focus on operational execution and building unique value through partnerships with leading operators and OEM vendors. As a leader, he holds a uncompromising belief in the company’s core values of integrity, transparency, teamwork, courage, creativity and abundance as the foundation of the company’s future. Mr. Knox a graduate of the University of Leeds, having lived in Europe, UK, Latin America, and US. He speaks fluent French and Spanish and is a member of Vistage and Young President’s Organization.


Malcolm Colman

Group Chief Operating Officer

Mr. Colman has over 27 years of operations management experience in Africa with a specialization in multi-vendor spare parts management. Prior to GSM Systems, Mr. Colman held a senior leadership position in the South African Defense Force for 12 years. Current responsibilities include overseeing services and trading operations from implementation, training to ongoing service and delivery improvements. Coming from an Industrial Engineering background, ensures adherence to GSMS best practices through process mapping and workflow design with structured metrics that focuses on the continual improvement cycle.


John Earley

Chief Technology Officer

John has a proven capability in technology and business leadership with extensive senior management experience focused mainly on the telecommunication industry. As a highly experienced business leader with a proven track record John maintains a very direct style of management whilst allowing his team to assume their own responsibilities and develop their own management capability. John ensures successful execution by understanding all aspects of the activity so that he can make fully informed decisions and offer guidance whilst understanding and open to the ideas of others. John always succeeds in motivating his team regardless of the operating environment and he ensures that full focus is maintained on the objectives with a strong desire to achieve. Having worked in 80+ countries John is culturally aware and interacts well with all levels, being proficient in French with native English John easily adapts to any environment.

Margaretha Ester Nainggolan

Indonesia General Manager

Ms. Etha brings more than 10 years working experience related with logistics, project control, legal drafting, quality service, and external customer alignment to GSM Systems. Previously she had been worked with Multinational Logistics company which had given her great amount of exposure on handling domestic and international delivery processes, external supplier alignment, customer complaint handling and also project controlling. She holds a Bachelor Degree from Parahyangan Catholic University majoring International Relations and currently holds ISO Lead Auditor Certification and also holds Basic Cargo Certification from Garuda Indonesia.


Joel Gichaba

Regional Finance Controller

Joel Gichaba works closely with clients and internal stakeholders for all aspects of Africa Region Financial reporting and cash management with a focus on revenue assurance, cost control,and optimal customer SLA delivery and client satisfaction. Joel worked has gained diverse professional experience in Information Technology, Logistics, Construction, Manufacturing,Telecommunication and e-commerce; and was in-charge of various key audit assignments for companies with KPMG in his early career. Joel led financial operations in South Sudan for Amoo Holdings International Limited as the Group Financial Controller. In  2017, Joel returned to Kenya and joined Jaza Space EA Ltd – a logistics optimisation firm where he implemented finance processes and systems, developed and enhanced controls, and spearheaded financial reporting & analysis. Joel worked for  KPMG from 2011 to 2012 in audit and 2013 to 2014 as senior audit lead. Joel has a second-class upper division degree in BSc. Agricultural Economics from Egerton University, with CPA, and ICPAK qualifications.


Gideon Itulua

Regional Head of Operations Africa

Gideon Itulua is the Regional Head of Operations for GSM Systems Africa. He is responsible for the operational performance of the African country units, managing customer satisfaction, SLA's as well as the budget and revenue performance for Africa. Gideon has demonstrated more than 6 years’ worth of contribution to GSM Systems with experience gathered from organic learning and from previous engagements as a Quality Assurance Manager. Mr. Itulua holds a Master’s degree in Business Administration from Edinburgh Napier University, UK. He also holds a post graduate degree in Information Technology form the NOUN University, Nigeria. He is a certified Warehouse and Supply Chain Professional and a certified Oracle10G Professional.