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 in February.  Fred initially works with another practitioner but after two years he opens 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.