Share onBuffalo Mayor Sean Ryan. Editor’s note: This is the first of two stories based on an in-depth interview with Mayor Sean Ryan. Sean Ryan’s seven-month tenure as mayor of Buffalo has been, at turns, refreshing and frustrating, hopeful and bewildering, celebratory and contentious. Most critically, according to Ryan, his administration has taken big, difficult steps toward correcting the city’s structural budget imbalances. Buffalo Mayor Sean Ryan.