John E. Mack III

Co-Head Investment Banking Group, Head of Security Group

Mr. Mack is the Co-Head Investment Banking Group and Head of Security Group. Prior to joining Imperial Capital, Mr. Mack founded USBX Advisory Services, LLC, where he was the Chief Executive of this preeminent boutique investment banking firm focused on the Security Industry. Before founding USBX, Mr. Mack served as Chief Executive Officer and a member of the Board of Directors of Protection One, Inc., the second largest security alarm monitoring business in North America and a party to approximately 200 M&A/Finance transactions. Mr. Mack earned a B.A. from Stanford University and an M.B.A. from the University of California at Los Angeles.

Rick Juarez

Managing Director, Security & Technology Investment Banking Group

Mr. Juarez is Managing Director focusing on the cloud security and infrastructure software and service sectors. Mr. Juarez was previously a  Managing Director with Waller Capital. Prior to Waller,
he was the Co-Head of Technology Investment Banking at Morgan Joseph TriArtisan where he advised infrastructure companies such as Advanced Data Centers, Media Temple, Digsby,, GlobalScape and others. Prior to Morgan Joseph, he worked as the Head of Investment Banking at Nollenberger Capital Partners. Mr. Juarez also worked as a Managing Director and Private Placement Investment Committee Member at Robertson Stephens & Co. Mr. Juarez has more than 20 years of combined investment banking, strategy, and operations experience. He has advised on more than 50 public/private financings and merger and acquisition transactions representing more than $8 billion in transaction value. Mr. Juarez earned his M.B.A. from the Harvard Business School, and received his B.S. in Finance, Magna cum Laude, from California State University, East Bay. He has also been awarded several U.S. Patent Office software patents.

William M. Lynch

Managing Director

Bill Lynch is a Managing Director focusing on Security M&A and strategic advisory. Prior to joining Imperial Capital, Mr. Lynch spent over 18 years at ProFinance Associates, Inc., where he spent his tenure working security, maritime technology, and high gross margin and repetitive income service businesses. In security and life-safety, he has managed and completed transactions in software, hardware, sensors, recurring revenue monitoring, and integration service businesses. Prior to ProFinance, Mr. Lynch was in industrial manufacturing, where he led strategic and capital planning, distribution, marketing, and sales with responsibility for the general management of the western United States for the Industrial Gypsum Division of USG Corporation. Mr. Lynch earned a B.S. in Business Administration from Menlo College.

Koby L. Tanzer, CFA

Managing Director, Head of Israel Office, Imperial Capital Israel Ltd.

Mr. Koby Tanzer is a Managing Director and Head of the firm’s Israel Group. Mr. Tanzer has been a member of Imperial Capital’s Security Practice Group since 2008. In addition to spearheading the effort to launch Imperial’s UAV/UAS banking coverage effort, he focuses on a range of corporate finance transactions for companies across the broader security sector. Prior to joining Imperial Capital, Mr. Tanzer was an Analyst in Lehman Brothers’ Investment Banking Division focusing on business service companies and financial sponsors. While at Lehman Brothers, Mr. Tanzer worked on M&A advisory, leveraged finance and equity underwriting transactions. Mr. Tanzer received his B.A. in Business Economics from the University of California, Los Angeles and holds the Chartered Financial Analyst (CFA) designation. He served in the Israel Defense Force’s Combat Engineering Corps as an Infantry Sapper and is an active member of his Regional Search & Rescue Team.


Brian Ruttenbur

Managing Director, Equity and Industry Research Group

Brian Ruttenbur is Managing Director in Equity Research covering the Security Industry.  Mr. Ruttenbur is HQ out of NYC for Imperial Capital and has over 25 years of experience in equity research. He was most recently spent over two years as a senior investment banker in the security sector closing several transaction including a corporate divesture and an endpoint cybersecurity sale.  As a research analyst, Mr. Ruttenbur is 2x ranked as a top analyst by the Wall Street Journal and 5x by Thomas Reuters for stock picking and earnings accuracy.   Prior to Imperial Capital Mr. Ruttenbur’s experience includes Drexel Hamilton (research and banking), BB&T Capital Market, CRT Sterne Agee Capital Group, Morgan Keegan and SunTrust. Mr. Ruttenbur earned a BA from University of Tennessee and MAS from University of Montana and served as a commissioned officer in the USAF guarding and securing nuclear weapons.