The prevalence of Big Data Analytics as a proxy for human decision-makingprocesses in globalized society, has catalyzed a call for the modernization ofthe mathematics curriculum to promote data literacy and ethical reasoning. Tosupport this initiative, ten preservice mathematics teachers (PSTs) in Sweden(SWE) and the United States (US) were interviewed to identify what ethicalconsiderations preservice teachers (PSTs) make in their mathematicalanalyses of data science contexts. Preliminary results indicate that teachersmake a myriad of ethical considerations in their mathematical work that aretied to their critical mathematics consciousness (CMC), conceptions of dataliteracy, and experiences. As a result, it is imperative that educatorssimultaneously design educational curricula to foster students’ CMC and workto transform teacher held definitions of data literacy to reflect changes broughton by globalization.