Abstract: This study filled a gap in existing knowledge regarding the impact of teamwork quality on New Product Development (NPD) cycle in the telecommunication industry in Saudi Arabia. This study analyzed the direct and indirect relationships between teamwork qualities; internal market orientation, environmental turbulence and NPD cycle time, while path coefficient and assessment of measurement and structural model used to test the research hypotheses. The aim of this study was to obtain the relationship between teamwork quality and new product development cycle time in telecom industry. Random sampling was used to select respondents for a survey for this study. Findings indicated that five out of six teamwork quality factors had significant effects on NPD cycle time but not on communication among teamwork members. Internal market orientation was found to affect positively NPD cycle time. Internal market orientation fully mediated the relationship between balance of member contribution and mutual support and NPD cycle time. Environmental turbulence moderated the relationship between two factors of teamwork quality, namely, communication and coordination and NPD cycle time. Environmental turbulence did not moderate balance of member contribution, mutual support, effort and cohesion.