Serena Simkus@serenasimkusFollow BadgesProblem Solving CertificationsCertificate: Problem Solving (Basic)VerifiedskillWork Experienceserenasimkus has not updated employment details yet.EducationColumbia University, New YorkLinksserenasimkus has not updated links details yet. Skillsserenasimkus has not updated skills details yet.