Cleinman Reflects on 30 Years Knowledge. It’s The Key To Business Growth, Longevity By LIBBY CUDMORE • Special to www.AllOTSEGO.com ONEONTA – The secret to business longevity, said Al Cleinman, is knowledge. “We had six people around the table the other day, and I realized that between them, they had 70 years of experience here,” he said. “We employ smart people.” The Otsego County Chamber of Commerce honored Cleinman Performance Partners this morning with a luncheon celebrating their 30 years…