Trust, experience, and dedication
We are a trusted team of experienced professionals dedicated to providing personalized tax, accounting, and business advisory services to individuals and businesses. We combine the personalized touch of a small firm with the expertise and resources of a large firm.
Our Mission
Our mission is to empower our clients to achieve financial success and navigate the complexities of the financial landscape. We do this by offering:
- Personalized attention: We take the time to understand your unique needs and goals.
- Expertise: We leverage our collective knowledge and experience to provide tailored solutions.
- Accessibility: We are committed to open communication and transparency throughout the process.
Who We Are
Porter & Sack comprises a team of seasoned professionals with diverse backgrounds and skillsets. Our partners and team members are passionate about building strong relationships with clients and helping them achieve their financial goals. We are driven by integrity, expertise, and a client-centered approach.
Our Leadership Team
Each member of our leadership team brings extensive experience, expertise, and dedication to the firm.
- Janet Hartung Renfert, CPA: Guiding the ship with her meticulous attention to detail and client-centric approach
- Justin Johnson, CPA: Creating a positive and collaborative office atmosphere
- Mark D. Krebsbach, CPA: Providing expertise and accessible explanations to clients
- Karen Prochaska, CPA: Offering support, guidance, and technical knowledge
- Erich Palecek, CPA: Contributing his strategic mindset and competitive spirit
- Nici Judnic, CPA: Leading the tax team with her sharp intellect and calm demeanor
- Joe Aliota, CPA: Providing valuable guidance and expertise in QuickBooks
Our Expertise
We offer a comprehensive range of services to meet your diverse needs, including:
- Tax planning and compliance: Individual and business tax preparation, planning, and compliance services
- Business consulting: Strategic planning, financial analysis, and process improvement
- QuickBooks consulting: Training, support, and ongoing guidance on the popular accounting software
- Accounting services: Comprehensive bookkeeping, financial statement preparation, and tax compliance services
Professionalism and Customer Service
Karen Prochaska at Porter & Sach is commended for providing exceptional customer service and expertly guiding clients through complex processes. Karen's responsiveness, ease of communication, and kind demeanor made a difficult process more manageable.
Lack of Prioritization
Smaller businesses and clients may not receive the attention they deserve from Porter & Sack. Some clients have reported slow response times and lack of priority, even when paying premium prices. This lack of prioritization has led to frustration and ultimately, a decision to seek alternative services.
Reliability and Effectiveness
On the other hand, several clients have reported positive experiences with Porter & Sack, citing professional and responsive service. One client has been working with the firm for 10 years and has found their services to be reliable and effective. Another client has been happy with the firm's handling of his taxes, involving US and overseas income, and has recommended them to friends and clients.
Poor Communication and Disorganization
However, some clients have experienced poor communication and dishonorable practices. One client reported having their file shuffled between three people for six weeks, only to be informed of a $500 charge. Another client experienced untimely and unprofessional communication.

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