Gregory N. Roberts

Chief Executive Officer & Director

Greg Roberts has been Chief Executive Officer and a Director of A-Mark since July 2005. Mr. Roberts has served as President and Chief Executive Officer of SGI since March 2008. Mr. Roberts previously served as the President of SGI’s North American coin division, which included A-Mark. He is also a lifetime member of the American Numismatic Association. Through his day-to-day involvement in all aspects of the Company’s operations, Mr. Roberts provides a vital link between junior and senior management personnel and the general oversight and policy-setting responsibilities of the Board. Mr. Roberts is a director of SGI (serving as such since 2000). Mr. Roberts also serves as Chief Executive Officer of SGI.

Mr. Roberts brings to the Board expertise in numismatics and trading, extensive knowledge of the precious metals industry and, in his role as Chief Executive Officer, in-depth knowledge of the Company and its business.

Thor G. Gjerdrum


Thor Gjerdrum was appointed as President in September 2016. Mr. Gjerdrum previously served as Executive Vice President and Chief Operating Officer from 2013 and as Chief Financial Officer and Executive Vice President from 2002 to May 2008, and from May 2010 to June 2013. Mr. Gjerdrum was Chief Financial Officer and Executive Vice President of SGI from June 2008 to April 2010. Previously, Mr. Gjerdrum held a variety of positions with two publicly traded telecommunications companies, the last of which was as Vice President of Finance, and worked in public accounting. Mr. Gjerdrum received a Bachelor of Science degree in accounting from Santa Clara University.

Brian Aquilino

Chief Operating Officer

Brian Aquilino brings to A-Mark over 25 years operations and logistics experience. Since joining A-Mark in 2001, Mr. Aquilino’s strategic thought leadership has had a pivotal role in transforming A-Mark into a global enterprise servicing millions of highly satisfied customers through multiple lines of business. This excellence has been recognized through several promotions from Director of Operations to Vice President of Operations and then in 2020 being appointed Chief Operating Officer.

Prior to A-Mark, Mr. Aquilino held several management positions as well as President’s Club membership at Pacific Bell Wireless, an operating division of AT&T Mobility. Prior to Pacific Bell Wireless, he was a strategic manager overseeing the LEC and ISP relationships at Covad Communication. Mr. Aquilino received his BA degree from University of Denver.

Kathleen Simpson-Taylor

Chief Financial Officer

Kathleen Simpson-Taylor has served as Chief Financial Officer since September 30, 2019. Prior to that time, she served as Executive Vice President, Controller and Assistant Secretary since November 2, 2017 after serving as Vice President, Controller and Assistant Secretary since January 2016. Ms. Simpson-Taylor formerly held various management and executive capacities for Mattel, Inc. from 1995 to 2015, including as Vice President, Mattel Division Finance and Vice President, USA Finance, and also served as a member of the Board of Directors of the Mattel Federal Credit Union from 2002 through 2004. Prior to Mattel, Ms. Simpson-Taylor held management positions at Ernst and Young, LLP, in both their US and Spain practice offices. Ms. Simpson-Taylor, a Certified Public Accountant, holds a Bachelor of Science degree in Accounting from Loyola Marymount University.

Armik Zakian

Chief Information Officer

Armik Zakian was appointed Chief Information Officer effective January 1, 2019. Ms. Zakian was most recently Vice President, CDO Business Intelligence, Advanced Analytics, and Big Data at AT&T/DIRECTV, where she served since 2005. From 1996 through 2005, Ms. Zakian was Director, Information Technology and Business Intelligence of EMI Music. Previously, she served as Senior Systems Manager, New Technologies and Architecture at Sony Pictures Entertainment. Ms. Zakian received a Master Degree in Electrical Engineering and Computer Science at Polytechnic University of Armenia (Yerevan, Armenia) and has completed post-degree programs at UCLA and Harvard Business School.

Michael R. Wittmeyer

Director & Chief Executive Officer of JM Bullion

Michael R. Wittmeyer is the co-founder and Chief Executive Officer of JMB. His journey in entrepreneurship started in high school, when he founded and then sold a successful digital affiliate marketing business. Building on that achievement, Mr. Wittmeyer co-founded JMB in 2011. Eight years later, Mr. Wittmeyer was Named EY Entrepreneur of the Year in the Retail/Consumer category in the Southwest region, and has led JMB to become one of the top precious metals retailers in the world. In addition to his management and executive background, Mr. Wittmeyer established the Patricia McCarthy scholarships at Allegany-Limestone Central School and Olean High School, which awards funds to students who demonstrate entrepreneurial spirit, and have a strong record of service and extracurricular involvement.

Mr. Wittmeyer, who has been a member of Entrepreneurs’ Organization since 2019, studied Marketing at Pennsylvania State University, and grew up in Western New York. Mr. Wittmeyer brings to the Board significant experience and expertise in eCommerce operations, search engine optimization (SEO), and digital marketing. His in-depth knowledge of JMB’s business is invaluable as the Board looks to grow its Direct-to-Consumer operations

David W. G. Madge

Chief Marketing Officer

David Madge has served in various capacities at A-Mark since September 2011. Prior to that, Mr. Madge held various positions with the Royal Canadian Mint (RCM), a Commercial Crown Corporation of the Government of Canada, since 1995, most recently serving as Executive Director of the Bullion and Refinery Business Services, which included the refinery plant operations. Mr. Madge previously served as Director of Bullion & Refinery Services for RCM, where he was responsible for global sales and marketing activities. Mr. Madge received a Bachelor of Science degree in 1983 and a Bachelor of Arts degree in 1987, each from the University of Waterloo (Ontario, Canada.)

Carol Meltzer

General Counsel & Director

Carol Meltzer has served as our General Counsel, Secretary and Executive Vice President since March 2014, assuming those offices at the time of the spin-off. Ms Meltzer was appointed as a Director on December 23, 2021. From 2006 to the spin-off, she held the positions of General Counsel, Secretary and Executive Vice President of SGI and its predecessor companies, and served in a variety of legal capacities for SGI since 1996. Ms. Meltzer previously practiced law at Stroock & Stroock & Lavan LLP and Kramer Levin Naftalis & Frankel LLP. Ms. Meltzer received B.A. and J.D. degrees from the University of Michigan, Ann Arbor. Ms. Meltzer also serves as General Counsel and Executive Vice President of SGI and as a director of SGI.

Steven Reiner

President of CFC

Steve Reiner was appointed as Executive Vice President, Finance Products and Ancillary Services of CFC in April 2018. Prior to that, Mr. Reiner served as Managing Director and Head of Consumer Investment Banking at B. Riley FBR, where he advised clients and assisted in raising capital in both the public and private markets. Mr. Reiner also served as Chief Business Development Officer of Great American’s Retail Solutions Group, a subsidiary of B. Riley Financial (NASDAQ: RILY), providing leadership in a range of turnaround and restructuring situations. Previously, Reiner served as Senior Vice President of Strategic Development at Skechers USA where his duties ranged from M&A advisory services to advertising as well as general corporate outreach. Reiner also served as President of Richard I. Koral, Inc. (dba Jessica’s). Reiner began his finance and banking career at Salomon Brothers and also held senior banking roles at Donaldson, Lufkin & Jenrette, BT Securities, Oppenheimer & Co. and Financo. He earned an MBA from the University of Virginia’s Darden School of Business and a BS degree from McIntire School of Commerce.

Jamie Meadows

President of AMST

Jamie Meadows has served as President of Silver Towne Mint since A-Mark acquired a majority stake in the business in 2016. From 2013 through February 2018, Mr. Meadows also served in various other positions, including Executive Vice President and General Manager, for Silver Towne, LP, the co-owner of Silver Towne Mint and a retailer of numismatics and precious metals, serving customers through its physical and e-commerce stores, and its live television show, The Coin Vault. Mr. Meadows has experience in mergers and acquisitions, and has successfully managed turnarounds and periods of explosive growth for multiple companies. Mr. Meadows spent much of his early career managing stores for The Home Depot, and later served as Vice President and General Manager for Ready Set Service, one of The Home Depot’s largest in-store service providers, with more than 1,000 employees across the US. Mr. Meadows received a Bachelor of Science degree in Christian ministries from Cincinnati Bible College.

Sadie Sayyah

President of Goldline

Sadie Sayyah has been with Goldline since 2006, and has served as President since November 2019. Prior to that, she served as the Director of Compliance from 2014 through 2019, where she led the development and implementation of compliance program enhancements, expanded leadership responsibility to oversee professional development and client services departments, and implemented programs and processes to enhance the professionalism of sales executives. Ms. Sayyah previously also held positions in Client Relations, Business Affairs and Client Services at Goldline. Ms. Sayyah received her B.A. in Sociology at University of California, Los Angeles and her J.D. degree at Whittier Law School. She is admitted to the California State Bar.