In 1953, David formed his own company and moved to 6 Mile Road. The company was called David Kelman & Co. Today, 50+ years later, that company is still in existence, having changed its name several times, but maintaining the original principals.

David Kelman died in 1972, but his presence and influence still remains among his clients, employees and shareholders of the firm. David Kelman was an accountant known for his compassion and kindness towards his clients and to their tax and accounting problems. He would constantly extend himself on their behalf, working long hours to provide quality, accurate and prompt service. This attitude is still the major focus of today's firm.

During the early sixties, the firm merged with Bernard Mintz and they moved to a new location on 8 Mile Road. During this period, Edward Rosenbaum married David Kelman's daughter. At the time Edward was working for Paul Kelman, a cousin of David Kelman.

Eventually the two firms merged, becoming known as Kelman, Rosenbaum, Levitsky & Rollins, bringing together the two cousins, the son-in-law and two other partners of the Mintz firm.

After the retirement of Manuel Levitsky and the death of Paul Kelman, the firm changed its name to Rosenbaum, Rollins & Associates, P.C. The name of the firm has subsequently been changed to Rosenbaum, Rollins & Olah, P.C.

In 2002, two new shareholders joined the firm, Dawn M. Reeves and James R. Olah.

From its earliest beginnings to the current period, the firm has specialized in providing accounting services to medical practices. The practice has grown steadily over the years and is known for the high quality and ethical services it provides.