Our Team

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Kim D. Arthur | James W. Concidine | J. Richard Fredericks | Blaine Docker | Hafeez Esmail | Alex Varner | Sharon L. Solerieu | Joe LaBarbera | Wayne Seaman | Jim Taylor | Robb Weiland | Davis deBoisblanc | Darol Ryan | Janey Kegley | Ryan Mullen | John Kehoe | Marissa Ditler | Matthew Tymstra


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Kim D. Arthur is a founding partner of Main Management, LLC. He currently serves as Main’s CEO and Portfolio manager. In 2009 Kim was recognized by Institutional Investor Magazine as a “Rising Star” of Foundations and Endowments. Kim is a regular speaker at national conferences and was a featured speaker at the Inside ETFs conference in Hollywood, Florida in January 2018. Kim has been profiled in articles by Index Universe and referenced in Barron’s, Wall Street Journal, Business Week and Fortune Magazine among others. Kim began his financial career in 1987 when he joined Montgomery Securities in their Institutional Sales division, marketing U.S. equities to Japanese institutions. He was promoted to Managing Director of Institutional Sales in 1997 during the period when Montgomery was purchased by Nations Bank. By 1999 he had advanced to the transitional head of International Sales for Banc of America Securities, following Bank of America’s takeover of Nations Bank. From 2000-2001 Kim was named the head of the Institutional Sales and Trading Department overseeing 60 sales traders in 6 cities. From January 2002 through August 2002 he was appointed the head of Equity Product Marketing. He served on the Investment Policy Committee and the Executive Management Committee at Banc of America Securities from 2000-2002.

James W. Concidine is a founding partner of Main Management, LLC. He currently serves as a Managing Director and is a member of the Investment Committee. Jim began his career in the financial services industry in 1970 as a stock broker for Dain Kalman Quail in Rochester and Minneapolis, Minnesota. He worked with retail clients from 1970-1978. When the CBOE opened in April 1973, Jim began to specialize in conservative covered call writing strategies. From 1978 to 1982, Mr. Concidine worked in the Institutional Sales group and was responsible for U.S. equity sales to institutional accounts in the UK. He joined Montgomery Securities in 1983 as Head of the International Institutional Sales Team. From 1983 to 1992 he expanded the department to a team of 10 brokers covering global accounts outside the US. He retired from Montgomery Securities in 1992. Since 1995, he has served as CIO for a sizable San Francisco family office where his duties include manager selection and asset allocation.

Ambassador J. Richard Fredericks is a founding partner of Main Management, LLC. He currently serves as a Managing Director and is a member of the Investment Committee. He began his career with Dean Witter in 1970 as a securities analyst. In 1977, he joined Montgomery Securities (now Banc of America Securities) as a partner and later Senior Managing Director in Investment Research, covering the banking and financial service area. For 17 consecutive years, Mr. Fredericks was chosen by Institutional Investor Magazine as an “All-American” Research Analyst, covering the commercial banking industry. In 1995, Mr. Fredericks formally changed roles to oversee the firm’s investment banking effort for the financial industry. Mr. Fredericks served as United States Ambassador to both Switzerland and Liechtenstein from 1999 to 2001. Mr. Fredericks currently is on The Library of Congress Trust Fund Board; the Board of Directors of Cadence Bancorp LLC; the Advisory Board of Financial Technology Ventures; the Board of Chambers & Chambers Wine Merchants; and as a grower and Board Member for Turley Wine Cellars. He has previously served on the board of Janus Corporation; the Board of Trustees at Loyola University of Maryland; Bancorp Hawaii and its main subsidiary, Bank of Hawaii; the Board of Directors of the Chiron Corporation; the International Advisory Board of Komatsu; the Board of Regents of Georgetown University and Georgetown’s Robert Emmet McDonough School of Business; as a Board Member of the Swiss/American Chamber in Switzerland; as on Entrepreneur in Residence at Weston Presidio; as a Regent of St. Ignatius College Preparatory School; and as a Trustee for The Town School for Boys.

Blaine Docker joined Main Management in 2005 and serves as the Chief Operating Officer. He is a contributor to the firm’s Investment Committee and oversees trading for all ETF and Option strategies. Blaine has had an active role in the creation of investment products for Main Management Fund Advisors and Main Management ETF Advisors. Blaine also spends time consulting with Main’s private client group, family office and institutional investor clients on a range of topics from tax and estate planning to asset allocation, risk management and financing. Prior to joining Main Management, he worked as a consultant for Capton Inc., a leading developer of RFID-based business control solutions for hospitality. At Capton, Blaine advised on International market viability and country specific export regulations. He has also worked at the U.S. Export Assistance Center in Denver, CO advising small businesses on export related issues. Born in Fresno, CA, Blaine received a Bachelor of Arts in Political Science from the University of Colorado.

Hafeez Esmail has served Chief Compliance Officer at Main Management since January 2013. He initially joined Main Management in September 2007 as Director of Marketing. Hafeez heads the firm’s compliance initiatives in addition to interacting with the firm’s family office, pension fund, and other institutional investor clients. He has published articles for ETF.com, where Main Management is a featured ETF strategist/asset manager, as well as CNBC.com. He was a panelist at the Superbowl of Indexing Conference in December 2009 where he spoke on the subject of “Customized Exposure and Risk Management”. Prior to joining Main he served as an advisor with Merrill Lynch Global Wealth Management. At Merrill he utilized ETFs as the actively managed core of client portfolios, as they provided an efficient means of diversification and risk mitigation. Prior to Merrill, he was an advisor at Morgan Stanley Global Wealth Management, working with wealthy individual clients, non-profit and corporate entities. Hafeez has also worked for the Department of Justice’s Antitrust Division, aiding in the criminal prosecution of corporate executives engaged in price fixing in the rubber chemicals industry. He holds a BA in Government and Economics from Bowdoin College and a JD from Seton Hall Law School.

Alex Varner joined Main Management full-time in July of 2012. He serves as Director of Research where his focus includes generating a variety of analytical reports for the firm’s Investment Committee. He interned with Main during the summer of 2011 while working towards his MBA from UNC’s Kenan-Flagler Business School, with a concentration in Investment Management, which was attained in May 2012. He grew up in San Rafael, California and received a Bachelor of Arts degree from Davidson College. Prior to business school Alex worked as a paralegal for the global capital markets, M&A team at the law firm of Hunton & Williams LLP and as part of the operations team at Lateef Investment Management.

Sharon L. Solerieu joined Main Management in June of 2016. She serves as Marketing Manager, focusing on telling our firm’s “story” through strategizing and creating collateral and campaigns across email, print, video, and web. She grew up in Anhui, China and later in San Gabriel, California and received a BA in Geophysics and Linguistics from UC Berkeley, with a minor in Geospatial Information Science. She is a proud alum of the University of California Marching Band, where she served as photographer and designer as part of the Public Relations Committee.

Joe LaBarbera joined Main Management in October of 2017. He serves as Vice President, assisting in trading of the firm’s strategies and focusing on internal systems optimization. Prior to joining Main Management, he worked as a Business Relationship and Credit Manager at Business Capital, a commercial finance company focused on small and middle market debt transactions. He grew up in Alamo, California and received a BA in Economics from Wake Forest University, where he was a member of the varsity football team. He obtained his MBA from the University of San Diego in 2016, participating in several internships programs ranging from Capital Markets to Private Equity Real Estate.

Wayne Seaman joined Main Management in April of 2018. He serves as Director, focused on building relationships with new and current clients. He grew up in Bayville, NJ and received a Bachelor of Arts degree in Biology from the University of Delaware. Prior to joining Main Management Wayne was a Sales Director at Legg Mason. He got his start in the industry as an internal wholesaler at Invesco.

Jim Taylor joined Main Management in May of 2019. He serves as Vice President, focused on assisting new and existing advisors. He grew up in Campbellsville, Kentucky and received a Bachelor of Arts degree from the University of New Mexico where he played basketball. Prior to joining Main he was a Regional Sales Consultant and started his career in the financial industry at Fidelity in 1996.

Robb Weiland joined Main Management in August of 2019. He serves as Director, focused on using his 20 years of experience in the business, and the resources at Main Management, to help Financial Advisors in Texas and the Southeast build deeper relationships with their clients and grow their assets under management. Prior to joining Main Management, Robb spent the prior 10 years working as Regional Director for Dunham & Associates, leading their sales efforts in the Central U.S. He got his start in the industry as a retail financial advisor with SunAmerica Securities. Robb grew up in Phoenix, AZ and graduated from Northern Arizona University, receiving a Bachelor of Science degree in Business. Robb enjoys sports, spending time outdoors and all that Austin, TX offers, with his wife Melynda and son Cameron.

Davis deBoisblanc joined Main Management in September of 2019. He serves as Vice President. He assists in developing deeper relationships with new and existing advisors. Prior to joining Main he worked as a Relationship Manager at Fidelity Investments. Davis grew up in Walnut Creek, California and graduated from the University of Oregon Lundquist College Of Business. Outside of work he enjoys spending time with friends and family, playing golf and taking weekend trips to Lake Tahoe.

Darol Ryan joined Main Management in 2019 as Managing Director, overseeing much of Main’s High Net Worth and Institutional Client business. Prior to joining Main Management, he ran TLD Capital and before that enjoyed a long career at some of the largest investment banks on Wall Street. He ran the Derivatives Import Business for Morgan Stanley (focusing much time on European clients) from New York and then went on to run Asia Derivative Sales for them in Hong Kong. Prior to that Darol worked in Equity Derivatives at both JP Morgan and Bank of America in New York. Darol started his career with Kim Arthur in 2001 at Banc of America Securities. Born in Houston, Texas, Darol received his Bachelor of Arts at University of California at Berkeley while also taking Mandarin courses at Middlebury College.

Janey Kegley joined Main Management in November 2019. She serves as Director. She brings 17 years of financial service experience having served in roles as a Financial Advisor, University Instructor for Business and Finance courses, Vice President of Investments with JP Morgan Chase, and Regional Vice President at FTJ FundChoice. She will focus on fostering collaborative partnerships with Financial Advisors and growing the team-based approach of Main Management’s investment strategies. Janey grew up in Eastern, Kentucky and holds an MBA from Morehead State University, with a concentration in Finance.
Ryan Mullen joined Main Management in February of 2017. He serves as Vice President, and after departing for a year of traveling around the world, he returned to Main in August 2020. He grew up in Stinson Beach, California and received a Bachelor of Arts degree in Economics and a minor in Political Science from Sonoma State University. While in college he worked as an Ambassador for the school of Business and Economics as well as an intern for Broadmark Asset Management during the summers of 2014 and 2015.
John Kehoe joined Main Management in May of 2021. He serves as Director, focused on using his 28 years of experience working with financial advisors to continue growth at the firm with new and existing clients. Prior to Main Management, he spent 19 years with SEI Investments working with financial advisors as a Regional Director leading their sales efforts in the Western U.S. He started in the industry with Boston Capital where he spent 9 years serving as a Regional Vice President. John received a Bachelor of Science in Business Finance from Salem State University. He enjoys sports and spending time outdoors in Northern California with his wife and two sons.
Marissa Ditler joined Main Management in June of 2021. She serves as a Portfolio Operations Associate supporting and maintaining the portfolio through operational tasks. Before joining Main Management, she worked on the Trading Operations team for Fisher Investments, working alongside the trading desk. She grew up in Woodland, California and received a Bachelor of Science degree in Business Administration with a concentration in Finance from the University of Oregon. Through college, Marissa worked as a Staff Accountant for the Division of Student Life at the university as well as an ambassador for the Lundquist College of Business. In her free time, she enjoys playing tennis and spending time with friends and family.
Matthew Tymstra joined Main Management in August of 2021. He serves as Vice President, focusing on business development and investor relations. Prior to Main, Matt worked on the operations team at Light Street Capital Management. Before that, Matt was a tax accountant servicing alternative investment fund clients at Andersen Tax. He grew up in Tiburon, California and received his Bachelor of Science in Economics and a minor in Applied Mathematics from Loyola Marymount University. In his free time, he enjoys surfing and fly fishing.