200 South Lafayette St., Greenville, MI 48838

Phone: (616) 754-3415
Fax: (616) 754-3518



Surveying Solutions Inc. uses the PZCO team to complete our FAR 31 audits. Their Audit team are very professional and well versed in the FAR 31 requirements. ~ Andrew W. Semenchuk, P.S., President

PZCO has a thorough understanding of the accounting requirements within Title 48, Part 31 of the Code of Regulations, which serves as the basis of accounting for overhead rate schedules. Great Lakes Engineering Group, LLC trusts PZCO to perform our annual overhead rate audit, not only because of their extensive training, experience, and knowledge, but because they have proven their performance with one of our biggest clients, MDOT ~ Amy L. Trahey, P.E. Project Engineer/Owner Great Lakes Engineering Group, LLC


Chief Executive Officer, CPA, CFP ®

Certified Public Accountant


Certified Specialist in Retirement Planning

* Registered Securities Representative

Trustworthy, Independent & Objective

Comprehensive Expertise

Convenient Personal Service

Affordable Quality Service

Experienced Accountant and Tax Advisor

  • Trusted advisor to millionaire and decamillionaire clients.
  • 27 years of practical experience in financial services field.

Respected Businessman

  • Recognized expert witness in accounting and tax matters.
  • Valued estate and financial services provider.

Dedicated to American Values

  • Former US Army Officer
  • Tireless advocate and lobbyist for taxpayer and business issues.

Author and Media Personality

  • Renowned author of numerous articles on tax and financial topics.
  • Appeared on television programs such as "Ask the CPAs" and "Ask the Financial Planners."
  • Sought-after speaker on tax and financial topics.


JS Professional Pic

President and Chief Operating Officer

Master’s of Business Administration (MBA) from Davenport University.

12 years practical experience in accounting field.

Member of the Michigan Association of Certified Public Accountants(MACPA) Sub-group on Transportation Issues.

Member of the American Council of Engineering Consultants (ACEC).

Heads all aspects of Parker Zarkowski's FAR related services, including audits, compilations and extensive work with the Michigan Department of Transportation (MDOT) and Commission Audit.

Extensive knowledge and experience with DCAA Compliance,  FAR Compliance and the AASHTO Audit Guide for A/E Consultants.


Check the background of this firm on FINRA's BrokerCheck.

Fee based advisory services offered through SSN Advisory, Inc, a registered investment advisor. Securities offered through Securities Service Network, Inc.,  Member FINRA / SIPC.

Gary Zarkowski is a registered representative offering securities through Securities Service Network, Inc., member FINRA / SIPC.  Branch office located at 200 South Lafayette St., Greenville, MI 48838. Licensed in these following states: MI, CA, FL, GA, IN, VA, WA.

To help the government fight the funding of terrorism and money-laundering activities, federal law requires all financial institutions to obtain, verify, and record information that identifies each person who opens an account.  What this means to you:  When you open an account with Securities Service Network, Inc., we ask for your name, address, date of birth, and other information that will allow us to identify you.  We may also ask to see your driver's license and other identifying documents.  We may share information obtained from you with third parties to verify your identity, in compliance with federal law.

Investment products and services available only to residences of MI, CA, FL, GA, IN, VA, WA. Fee-based advisory services available only to residences of MI, CA, FL, GA, IN, VA, WA.