Skip to content

John Gruber
Operating Partner

phone: (248) 554-4226
email: jgruber@o2investment.com

Mr. Gruber is a Certified Public Accountant, and a seasoned corporate executive with over 30 years of experience in finance, accounting and corporate administration.  He provides guidance to O2’s portfolio companies on financial reporting, accounting practices and systems, tax planning and compliance, and HR.  Mr. Gruber also advises on strategic planning implementations at portfolio businesses and participates in review and due diligence efforts of target acquisitions.

Before joining O2, Mr. Gruber was the CFO of Silbond Corporation and managed the highly successful exit from the business by O2 in early 2014. Mr. Gruber also has 13 years of public accounting experience with KPMG, where he provided accounting, auditing, tax, M&A due diligence, and business advisory services to a wide variety of clients in diverse industries and markets.

Mr. Gruber serves on the Board of Directors of Greco Aluminum Railings and as an advisory member to the boards and senior management of all of O2’s portfolio businesses.

He is an honors graduate in accountancy from The University of Michigan’s Ross School of Business.