Zielinski Companies began serving religious and non-profit organizations in 1957. The founder, William L. Zielinski, began working with clients in the Midwest as great changes were starting to take place for religious congregations. During the early years, it became apparent that specialized services had to be developed to serve the needs, lifestyle, and mission of religious and non-profit organizations. Consequently, services were developed to advance the mission of these specialized groups.

From that early start of providing accounting, auditing, facility, and resource planning services, Zielinski Companies has grown into a worldwide provider of a complete range of services for religious and non-profit organizations.

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