About Sustainable HR 


As a division of Kollath CPA, we are a dedicated human resource outsource service team with over 30 years of industry experience serving Madison, Milwaukee, and the surrounding areas. Our division was created to assist businesses that have 1 to 50 employees with building a strong foundation that nurtures sustainability and growth. 


Our experienced consultants will work one-on-one with you to ensure that your business's unique needs are met. We offer temporary service to assist with staff leaves and long-term service, where a member of our team will feel like an extended part of your work family. 


In addition to our human resource outsource service offerings, we also provide payroll, tax, and accounting support, so our clients can have a variety of needs satisfied through one source. 


If you would like more information on our outsource services, please email us at contact@sustainablehr.net or call 608-416-1003.