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The Optivest Investment Banking Team

Paul Donnelly Paul J. Donnelly

Senior Managing Director

Paul Donnelly founded Optivest IB after having spent 25 years as an investment banking professional and principal investor.

Paul Donnelly has a successful track record of working with emerging growth and middle-market companies to enhance shareholder value through various corporate finance initiatives, including M&A, recapitalizations, equity and debt financings and valuations/fairness opinions. He has served as a financial advisor on numerous successful engagements representing over $3.25 billion in transaction value for clients such as: Insight Genetics, Monk Development, Enerliance, FEX DMS, CVE Technology, Lead Tracking Solutions, GeoMicro, WebFinancial, Interush, Benihana, TS Restaurants, Hu Hot, Earthbar, Western Sizzlin, IGT, Trend Offset, MyPrint, eWork, Proxim Wireless, Steel Partners, Accurate Metal Fabricators, Trojan Battery Corporation, TriStar Global Energy Solutions, TV Ears, The Counter, Yard House, Radius Medical, Baja Fresh, Islands Restaurants, Strasbaugh, Intercoastal Manufacturing Company, DynTek, Motion Engineering, Marko Foam Products, Iteris, Avalon Digital Marketing Systems, Rand Technology, NetsWork,, Triton Network Systems, Comteco, Action Instruments, Continuous Computing, Meltronics, Verteq, Pro-Log, Dartron, Adflex Solutions, Athens, Visqus Corporation, Somatogenetics and Grand Prix Association of Long Beach.

Prior to founding Optivest IB, Paul was a Managing Director with the Los Angeles-based investment banking firm B. Riley & Co., which merged in 2003 with his previous firm, L.H. Friend, Weinress, Frankson & Presson. He has been involved in corporate finance since 1983, when he began his career with L.F. Rothschild, Unterberg, Towbin. From 1984 to 1986, he was with the venture capital firm Enterprise Management Company. From 1986 to 1992, Paul was a Vice President with Pacific Ventures Finance, a leading venture debt fund for institutionally backed emerging growth companies. From 1992 to 1995, he was a Senior Vice President with Ally Capital Corporation, a venture debt and corporate finance firm. From 1995 to 2003, Paul was a Managing Director of Corporate Finance with L.H. Friend, Weinress, Frankson & Presson.

Paul Donnelly received his B.S. in Finance and Business Administration from San Diego State University and holds FINRA Series 7 and Series 63 licenses.

Steven Gribic Stevan Grubic, ASA


Stevan Grubic has over 15 years of middle-market investment banking experience providing financial and strategic analysis for a broad range of financial advisory mandates, including buy and sell side M&A, private placements, recapitalizations, distressed situations and business valuations/fairness opinions. He has participated in or directly managed over $400 million in transactional and sourced capital and completed over 100 business valuations and related strategic analyses representing well over $1.0 billion in asset values. Stevan’s most recent transactions include M&A, corporate finance and/or valuations for clients such as: Enerliance, Interush, FEX DMS, TS Restaurants, CVE Technology and Earthbar.

Additionally, as an accredited senior appraiser with the American Society of Appraisers (ASA), Stevan is an expert in all aspects of business valuations, including fairness opinions, fair value accounting treatments, option and warrant pricing and intangible assets and other intellectual property.

Prior to joining Optivest IB, Steve was with the regional accounting firm of SingerLewak. Previously Stevan was a Senior Vice President with the Los Angeles-based investment banking firm of B. Riley & Co., a leading, full-service regional securities broker-dealer and investment bank. Stevan was also formerly with the investment banking firms of L.H. Friend Weinress, Frankson & Presson and North American Capital Partners.

Stevan Grubic received his B.S in Finance and Business Economics from the University of Southern California.

Mark Van Mourick Mark Van Mourick

senior Advisor

Mark Van Mourick has over 4 decades of experience as a Money Manager and Registered Investment Advisor. He established Optivest Wealth Management in 1987, managing the investment portfolios of several of the nation’s wealthiest families through building strategic, diversified portfolios for his clients targeting low volatility and consistent growth. Prior to opening his own firm, he was one of the leading retail brokers of Smith Barney/Orange County.

In addition to his expertise in stocks and finance, Mark has extensive experience in business and real estate. He is the author of “Cash Out, Cash In – The After Success Investment Guide”, and is also an experienced investor in a wide variety of investment vehicles including stocks, real estate and venture capital.

Mark is a graduate of the University of Southern California with dual Bachelor of Arts degrees in International Finance and Business Management. He serves on the executive boards of numerous companies, is an active speaker and the founder of the Orange County Exit Planning Roundtable.

In addition to his business achievements, Mark is founder and President of The Optivest Foundation which donates hundreds of thousands of dollars every year to Christian Ministries. Optivest Wealth Management, Optivest Investment Banking, Optivest Properties and Optivest Retirement Strategies donate 10% of gross annual revenue to charities around the world. Employees and clients are encouraged to bring forward their ideas for charitable giving for consideration.

Leslie CalhounLeslie Calhoun

compliance advisor

Leslie Calhoun employs over 20 years of investment experience and financial operations. At Optivest IB, Leslie advises on all FINRA and regulatory matters pertaining to investment banking operations. Prior to joining Optivest, Leslie worked as an Institutional Sales Trader and Market Maker for several Broker/Dealers and has knowledge of insider and restricted shares, and IPOs. In recent years, she has worked with private and public companies seeking capital to arrange financing with Hedge Funds and Venture Capital Investors.

Leslie holds various FINRA licenses including FINRA Series 7, Series 24, Series 55, Series 63 and Series 65. She received a Bachelor of Arts degree from the University of Louisville and was recognized as a Wall Street Journal Woman of Note in 2015.

Horacio Durazo Horacio Durazo


Horacio Durazo provides over 14 years of accounting and management experience to the Optivest IB team. As Controller for the firm he is responsible for financial statement preparation, analysis and cash forecasting. Horacio holds an active California State CPA license along with a Bachelor of Arts degree from University of California, Berkeley and a Masters of Business Administration from University of California, Irvine.

Ashlee Enzensperger Ashlee Enzensperger

Operations and IT Administrator

Ashlee provides Optivest IB with in-house IT and technical support. She brings over 10 years of experience to our team and is responsible for all aspects of technology integration and management. In addition, Ashlee provides client portfolio support and administration for Optivest’s wealth management operations.

Shannon Patton Shannon Kavlich


Shannon Kavlich oversees all administration functions within the firm and brings 10 years of marketing experience to the Optivest IB team. Prior to joining Optivest, Shannon worked for Optivest Wealth Management as the Director of Client Services. Originally from Southern California, Shannon earned a Bachelor of Arts degree in Communication Studies and Art History from Westmont College, Santa Barbara.