One of the most important parts of running your business is managing the books. If your finances aren’t in order, your business can suffer. Not only does streamlined bookkeeping help you to manage your business to improve your bottom line, but it also helps to avoid potential legal problems with the IRS.

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Theresa Schwager, President

Theresa graduated early from Hamilton High School, Milwaukee, WI in Dec. 1975. She worked full-time at various businesses while raising a family with 4 children. Many years later she received her B.A. in Business Management from Alverno College, Milwaukee, WI in 1994. She also carried minors in Market Research and Global Studies.

Theresa is no stranger to the world of entrepreneurialism. Her father owned his own painting and cleaning businesses and she worked for him on large jobs doing detailed painting, specializing in painting decorative wrought iron.

At DMS Theresa is in charge of client management. She is also in charge of all aspects of the client’s Financial Statements and other Monthly and Quarterly reports.

In her spare time she enjoys spending time with her children, grandchildren, great-grandchild, and her dog, Kato. She also enjoys restoring (and repairing) her 1927 Craftsman Bungalow.

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Breanna Schwager, Assistant Bookkeeper


Breanna graduated from Vandalia High School, Vandalia, IL in 2014. In 2015 she moved to Wisconsin and became a team member of DMS.

Breanna is in charge of data entry and all aspects of payroll. She works diligently entering every transaction for our clients from bank and credit card statements. She is also in charge of bank reconciliations and works closely with Theresa to provide her with all the data needed to produce Financial Statements.

In her spare time she enjoys spending time with her son. She is also an entrepreneur creating paintings and arts and crafts, which she sells to her customers.

She currently works remotely from her hometown in Vandalia, IL.


Diversified Management Services, Inc. (DMS) provides personalized services to help businesses grow. We work exclusively with QuickBooks® accounting software to offer bookkeeping, accounting, business development and management services to small businesses in southeastern Wisconsin since 1993.

DMS is a long-standing member of the American Institute of Professional Bookkeepers. We take pride in the work that we do. Since 1993, our mission has been to provide quality work at a fair price to local small businesses in Southeastern Wisconsin. Our rewards are our relationship with you and watching your business grow and become profitable year after year.

Diversified Management Services, Inc.

SouthEastern Wisconsin small business bookkeeping service.

10520 W. Bluemound Rd., Suite 106
Milwaukee, WI 53226

Phone: (414) 231-3702