This dissertation incorporates the ontological perspective of sociomateriality into the literature on teamwork process to posit that member behavior and technology use are inherently enmeshed (termed process sociomateriality). Three programmatic studies were conducted In order to establish the construct and examine the effects of process sociomateriality on team functioning. First, a qualitative critical incident study (Study 1) found that process sociomateriality is comprised of three higher-order dimensions, reflecting that technology use in team settings may facilitate, expand, or impair process behaviors. A psychometric measure of process sociomateriality was then developed and administered to the general population in Study 2. Findings from Study 2 revealed that the measure exhibits acceptable psychometric properties and displays sufficient convergent and discriminant validity with relevant teamwork constructs. Study 3 tested the manner in which the process sociomateriality factors impact important team outcomes. Findings revealed that process facilitation and expansion improve team performance and team viability indirectly by shaping affective and motivational states. Further, results also demonstrated that the process sociomateriality factors account for variance in team viability and emergent states beyond prior conceptualizations of the process/technology relationship.