chief memory officer
n.— «Some company hire historians to write their histories, whereas others remember the simple truth that their long-tenured employees are their best historians. These “chief memory officers” are informally asked to look back over past projects, successful and unsuccessful, before any “innovation” is launched or relaunched. Every company needs memory keepers.» —by Eric Abrahamson Change Without Pain Dec. 4, 2003. (source: Double-Tongued Dictionary)