Reporting to Matrix President Mark Marsters, she will also work closely with Reliance Standard’s Product Strategy team to build and refine integrated solutions and best practices related to absence, disability and productivity. Walker oversees an all-attorney Product Compliance team responsible for development, deployment and refinement of Matrix’s service offerings. She succeeds Marti Cardi, who originated the role in 2015 and will continue to work in a senior consulting role. PHOENIX-( BUSINESS WIRE)-Matrix Absence Management (Matrix), a leader in helping employers proactively manage employee absence and work force productivity, has named Nell Walker Vice President, Deputy General Counsel & Chief Compliance Officer.