Sarah P. Helfers rejoined Baker McKenzie as counsel in the corporate and securities group.Helfers’ practice focuses on managing the corporate implementation of complex domestic and cross-border intercompany transactions.She joins from Morgan, Lewis & Bockius LLP.• Marshall, Gerstein & Borun LLP elected Michael J. Allikian, Jonathan C. Hughley and Cameron B. Pick to partner.Allikian prosecutes patent applications for a range of molecular biology technologies, including nanobiotechnology, genomics and …