We are seeking a Lead Data Scientist to assess how current models are built and applied, identify weaknesses, and recommend improvements based on sound mathematical and operations research principles.ResponsibilitiesIdentify flags such as formulation errors, infeasibilities, unboundedness, poor scaling, non-convexities, and inappropriate solver or method choicesAssess whether each problem is modeled with the right approach, whether linear, non-linear, or convex formulationDetermine the suitability of linear versus non-linear programming methods for a given problemSuggest clear, actionable improvements to models, methods, and solution approachesDocument recommended changes and findings for stakeholders and technical teamsRequirements5+ years of experience in optimization, operations research, or applied mathematicsIn-depth knowledge of Convex Optimization, including convexity, duality, and optimality conditionsStrong command of Linear Programming, including formulation, the simplex and interior-point methods, sensitivity analysis, and dualityVery good understanding of Linear and Non-linear Programming, including their theory, solution methods, and limitationsEnglish proficiency at B2 level or higherNice to haveBackground in Oil & Gas domainWe offerCONTINUOUS UPSKILLING, LEARNING & DEVELOPMENTDiversity of tasks and projectsAssessment center for objective review of competency levelPersonal development planMentoring programs and leadership developmentCertification and professional development supportAccess to learning platforms including more than 2,500 internal coursesEnglish courses taught by certified teachersCORPORATE BENEFITSExtra leave daysReferral bonusesCOMPENSATION PACKAGECompetitive compensation paid in USDRegular salary and performance reviewsMEDICAL & HEALTHCAREPrivate health insuranceWell-being eventsWORKING ENVIRONMENTRecreation areas and kitchensTea, coffee and snacksSports equipment and game consolesIT EquipmentMicrosoft’s Software Assurance Home Use Program (HUP)Please note that our Talent Attraction Team reviews applications and CVs submitted in English.EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.