In literature, the Maasai community has been identified as the dominating ethnic group among the multiple pastoral communities in Tanzania. The Maasai socio-cultural practice is under external pressure in meaning negotiation and interpretation. The literature identifies globalization and modernity elements as the most influential external factors. Furthermore, project planning is considered as inseparable from globalization and modernity elements as all are focused on social change processes. Different literatures consider discourses as the core of the change process, and that pastoral development projects are associated with discursive practices through its communicative dimensions that entail social interactions whereby discourses are produced, distributed, and consumed. Although studies in development projects are fundamental in understanding discursive practices of such projects, this paper found a very limited body of knowledge on discursive practices in development planning specifically in the Maasai community. Therefore, this paper uses Critical Discourse Analysis (CDA) to underscore constructive effects of the used discourses in project documents targeted to the Maasai community on its wider socio-cultural context. This paper employed Fairclough three dimensional model of CDA as its underpinning theoretical and methodological approach. This model guided analyses of the data retrieved from eight (8) project strategic documents that were targeted to the Maasai community. Analyses involved three analytical levels which are textual analysis, discursive practices analysis and socio-cultural practices analysis level as depicted in the used model. Analysis was eclectic in nature as it involved forth and back analyses between the three levels, whereby the first two levels informs socio-cultural constructivism effects of the used discourses. Generally, the study revealed construction of Maasai’s identity, social relations and varying ideologies as the major three categories of constructivism effects of the underscored project planning discourses in the Maasai community. Furthermore this paper found devastating misconceptions and domination of negative portrayals of the Maasai community within the analyzed documents. Finally this paper recommends radical shift on the conveyed meanings and misrepresentation of the indigenous communities specifically the Maasai community in the global and national strategic and developmental process or frameworks.