Mission Statement

We invest in the best people who have the passion, skills, and expertise to help our team and clients develop strategies to achieve long-term success. Team members are given opportunities for personal and professional development along with involvement in the decision-making processes within the firm. This provides our team with the satisfaction of working in a challenging and stimulating environment.

We work closely with our clients to anticipate their needs and help guide their actions, providing significant value in the services we perform. We utilize state-of-the-art technology and clearly-defined processes to maintain quality and perform only services in our core competencies that our clients value and need.

Core Values

  • Customer Experience: Enhancing client knowledge while providing valued, high quality customer experiences in our areas of expertise.
  • Teamwork: Achieving success through teamwork focusing on communication and accountability.
  • Professional Growth: Offering team members challenging work assignments to grow their knowledge with advancement potential within the firm.
  • Integrity: Demonstrating humility, respect and integrity while adhering to the ethical standards deserving of our CPA firm designation.


In 1949, H.G. Siepert & Company was established in Beloit, Wisconsin. Since then, Siepert has grown to include more than 20 professionals located in three offices. In 1974, our second office was established in Sycamore, Illinois followed by our Roscoe, Illinois office in 1994.

We believe in promotion from within and are proud to say that each of our partners began their careers at Siepert as staff accountants. Only after proving their skills, abilities, and commitment to customer service were they promoted. While their job titles might have changed, their commitment to client service has always remained a priority.