Senior Leadership Team

50 years of combined industry experience


ISCorp’s Senior Leadership has over 50 years of combined industry experience. Their backgrounds and years of private cloud management experience have propelled them into top leadership positions.


Beyond their exceptional adeptness in their professional fields of expertise, these knowledge leaders exemplify our operating principles of integrity, ethics, and diligence.



President & Chief Executive Officer

Mike Weber is ISCorp’s Founder and acting President and CEO.  Mr. Weber started his career in the aerospace industry in 1985 designing cockpit avionics for McDonnell Douglas on the C-17 Military aircraft.  In 1987 he founded what was to become Integrated Systems Corporation (dba ISCorp).  Initial clients were Fortune 500 public companies including Motorola, Hughes AeroSpace and GE Medical.


With 30+ years of leading ISCorp and directing corporate strategy and product vision, Mr. Weber is principally responsible for ISCorp’s industry leadership in secure financial cloud services, PaaS, IaaS, and colocation services, with a focus on custom highly-available, mission-critical operations. 


Mr. Weber holds a B.S. in Electrical Engineering and Computer Science from Marquette University.  Since 1994 Mr. Weber has held several long-term board positions at ONE (Oneida Nation Electronics), Children’s Service Society of Wisconsin, Children’s Hospital System of Wisconsin and Nova Cycle Sport Foundation.


Carie Cieslewicz

Senior VP – Finance, Administration, and Compliance

Carie Cieslewicz has 20+ years of experience in accounting, audit and compliance, human resource management, and project management.  Ms. Cieslewicz oversees certain day to day operations and the audit and compliance program at ISCorp.  Prior to joining ISCorp in 2006, Ms. Cieslewicz worked for Arthur Andersen in external audit and a large non-profit healthcare provider in internal audit and accounting.  Ms. Cieslewicz holds a B.S. in Accounting from the University of Wisconsin, Green Bay.  She has both her CPA license and is a Certified Internal Auditor (CIA).



Senior VP – Business Development

Jeff Zillner, Senior Vice President of Business Development, has over 32 years of experience in the high-tech industry.  Mr. Zillner started in the medical imaging field with various technical and support responsibilities including Director of Global Support Services.  For the past 22 years Mr. Zillner has held various positions at ISCorp and now is responsible for high level strategic account management and business development. Mr. Zillner holds a B.S. In Biomedical Engineering from the Milwaukee School of Engineering.



VP - Business Development

Tim Roloff is ISCorp’s Vice President of Business Development.  Mr. Roloff’s 30 year IT career started in the Consumer Products industry where he held various positions including Systems Manager, Global Project Manager, Business Manager, and Client Director.  For the past 12 years Mr. Roloff has held Enterprise Sales and Global Account Director positions in the systems integrator and software industries.  Today Mr. Roloff manages New Business Development for ISCorp, accountable for building strategic customer relationships.  Mr. Roloff holds a B.B.A. in both Marketing and Management, with a Specialization in International Business from the University of Wisconsin, Madison.

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Marc Vandiepenbeeck

Member of the Board of Advisors, Director of European Development

Marc Vandiepenbeeck has over 20+ years as a Financial Executive with an array of global experiences and expertise, he is now a Company Officer and Treasurer of Johnson Controls. Mr. Vandiepenbeeck’s vast experience in the global financial industry started in 2000 where he worked in the corporate development group of a global leader in medical diagnostics instrumentation. Currently he manages all aspects of the global treasury function for Johnson Controls, including capital markets activity, trade finance, funding strategy, global liquidity, investment and asset management, strategic banking relationships, capital allocation, cash management and compliance & reporting for treasury operations. Mr. Vandiepenbeeck serves on the Board of Directors for several Milwaukee area organizations and his vast expertise in global affairs has provided ISCorp with great knowledge of understanding as we continue our European Development. Mr. Vandiepenbeeck holds a B.S. in Engineering Management from the University Libre of Brussels and a Master’s degree in Science of Management from Solvay School of Economics.

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Howard Bornstein

Member of the Board of Advisors

Howard Bornstein is an experienced Financial Executive with a demonstrated history of working in a variety of industries. Mr. Bornstein has strong finance professional skills in budgeting, operations management, accounting, scenario planning, taxes, strategic planning, and team building. Mr. Bornstein spent over 15 years working with Foth & Van Dyke, a privately owned consulting engineering firm holding the title of CFO. In his time with the organization Foth & Van Dyke grew its revenue from $30mm to $140mm while expanding from five to 20 offices and doubling their employee count. Previous experiences include over 20+ years as a Tax Partner with KPMG, additionally in 2019 he founded the Financial Executives International (FEI) Utah Chapter with a goal of sharing his experiences with the Utah business community. Mr. Bornstein’s years of commitment and proven results as a financial executive are a tremendous asset to our ISCorp team. Mr. Bornstein holds a BBA in Accounting from the University of Wisconsin, Madison.

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