1953 – During a visit to Lewistown on a state audit assignment, Fred Schell notices a need for a tax practice and likes the community. He resigns from the state and moves to Lewistown opening his own firm – Schell Accounting.

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1958 – Fred passes the CPA exam and practices on the third floor of the Montana Building.

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September 1960 – Marvin Stephens joins Fred and becomes a partner in 1964.  Marvin continues to work for the firm until a few months before he passed in 2004.

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1963 – Wayne Riley joins the firm and becomes a partner in 1967.  He retires in May 2004.

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1968 – Dale Huffine joins the firm and becomes a partner in 1972.  He retires in 2015.

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1969-75 – Fred sits on the first ever State of Montana Board of Public Accountants.  Fred works with the Montana Society of CPAs in its effort to establish a board of accountants.  After his term ends, Marvin serves a term on the board.

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1982-83 – Fred helps found the Central Montana Foundation.

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1984 – Mickey McMillan joins the firm and becomes a partner in 1999.

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1990 – Fred retires but continued working with the firm in consulting and advisory assisting long time clients.

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2002 – Stacie Arntzen joins the firm and becomes a partner in 2009.

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2004 – Jodi Ruckman joins the firm and becomes a partner in 2011.

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2013 – Huffine, McMillan, Arntzen, Ruckman, PLLP celebrates 60 years in business with the grand opening of its new offices on the sixth floor of the Montana Building.

2014 – Dale retires from firm.

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2020 – Mickey retires as partner, but continues working with the firm and serving long time clients.