Epizyme Inc. said Andrew Singer will step down as CFO and executive vice president of finance and administration at the end of August to pursue other business opportunities.

Susan Graf, chief business officer, will take over the responsibility for the finance organization going forward, including Epizyme's financial reporting and analysis group.

Epizyme plans to add a senior vice president of finance beginning in September and has secured the professional finance consulting services of Danforth Advisors during this transition.