Big Data (BD) is considered as the most powerful currency and the main driver behind most current technologies such as block chain, the internet of things, and artificial intelligence. The maturity level of a company determines the level of successfulness in BD of that company. There is a big impact of BD in the telecommunications industry since it contributes heavily in: optimizing network services and usages, improving security, and enhancing customer service and experience. This study assesses the perceptions held by information technology professionals regarding the maturity and value of BD in the telecommunications sector in The Republic of Yemen. The questionnaire was developed, validity tests were conducted (virtual, discriminatory, formative, and subjective) and a reliability test was conducted on it to ensure its ability to measure the reality of information technology Professionals' perceptions regarding the maturity and value of big data. The study population consisted of (213) Professionals in Information Technology Professionals in the Telecommunications Sector in the Republic of Yemen. The sample was selected using the comprehensive enumeration method, and the analysis was done on all telecommunications companies in Yemen, which consists of 6 companies. The study shows the results, the most important of which is a statistically significant effect between BD maturity and BD value in the telecommunications sector in the Republic of Yemen with a percentage (59.6%).