Gustav Langford is a financial advisor with Siebert AdvisorNXT, LLC., holding a Series 63 designation and 27 years of industry experience. He has worked at Muriel Siebert & Co., Inc. and Stockcross Financial Services, Inc. Langford volunteers one hour per month at the Elkins Park Firehouse. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through its web-based AdvisorNXT program, using algorithmic portfolio construction based on Modern Portfolio Theory and offering both discretionary and non-discretionary account management.

Marvin Rivas is a financial advisor at Siebert AdvisorNXT, LLC with five years of industry experience. He holds a Series 66 designation and has worked at Siebert AdvisorNXT and Muriel Siebert & Co., Inc. since 2021. Prior to his career in finance, he held positions at XPO Logistics, New Jersey Institute of Technology, CVS Pharmacy, and Elizabeth High School. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through a web-based platform that combines algorithmic portfolio construction with dedicated advisor support. The firm offers both discretionary and non-discretionary account management and integrates strategies such as mean-variance optimization and covered-call transitions.

Zachary Banks is a Series 66 licensed financial advisor at Siebert AdvisorNXT, LLC with two years of industry experience. He has worked at Muriel Siebert & Co., LLC and LPL Financial LLC, and previously at Rollstone Bank and Trust. Banks splits his time between Siebert AdvisorNXT and Muriel Siebert & Co., serving as an investment advisory representative at both firms under common ownership. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through a web-based platform that combines algorithmic portfolio construction with access to third-party sub-advisors. The firm offers discretionary and non-discretionary account management and features strategies such as covered-call transitions alongside automated portfolios supported by human advisors.

Angelo Guerriero is an investment advisor representative at Siebert AdvisorNXT, LLC with 43 years of industry experience. He has been with Muriel Siebert & Co., Inc. since 1999 and splits his time evenly between that firm and Siebert AdvisorNXT, both of which are under the Siebert Financial Corporation umbrella. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through its web-based AdvisorNXT program. The firm uses algorithmic portfolio construction based on Modern Portfolio Theory and offers a combination of automated strategies with dedicated advisor support, managing accounts on both discretionary and non-discretionary bases.

Peter Sosnowski is an investment advisor with Siebert AdvisorNXT, LLC, holding Series 63 and Series 65 licenses and bringing 39 years of industry experience. He has worked at Muriel Siebert & Co., Inc. and its affiliated entities since 1999. Sosnowski divides his time between Siebert AdvisorNXT and Muriel Siebert & Co., LLC, both under the same parent company. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through a web-based platform that combines algorithmic portfolio construction with access to third-party sub-advisors and dedicated investment adviser representatives. The firm offers discretionary and non-discretionary management, utilizing ETFs and ETNs within a framework informed by Modern Portfolio Theory.

Mark Malek is an investment advisor representative with Siebert AdvisorNXT, LLC and Muriel Siebert & Co., Inc., holding Series 63 and Series 65 licenses and bringing 15 years of industry experience. His career includes roles at multiple firms, such as Wealthsource Partners, Vellum Financial, Quantitative Insight Partners, and Praxis Insight Advisors. He divides his time between Siebert AdvisorNXT and Muriel Siebert & Co., both affiliates under Siebert Financial Corporation. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through a web-based platform that combines algorithmic portfolio construction with access to dedicated investment advisors. The firm offers discretionary and non-discretionary account management, utilizing strategies such as mean-variance optimization with ETFs and ETNs, and maintains affiliations with in-house broker-dealer and custodial partners.

Kyle Gonzalez is a financial advisor with Siebert AdvisorNXT, LLC., holding a Series 66 license and two years of industry experience. He has been with Muriel Siebert & Co. since 2021, working full time split between Muriel Siebert & Co. and Siebert AdvisorNXT, both under the Siebert Financial Corporation umbrella. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through a web-based platform that combines algorithmic portfolio construction with access to third-party sub-advisors and optional dedicated investment adviser representatives. The firm offers discretionary and non-discretionary management, with notable features including covered-call transition strategies and integration with an affiliated broker-dealer.

Sarah Braddock is an investment advisor representative with Siebert AdvisorNXT, LLC, holding Series 63 and 65 designations and nine years of industry experience. She has worked at Searchlight Investments, LLC and Searchlight Financial Advisors since 2016, and previously held positions at Baruch College and MSG Entertainment. Braddock is a dual employee, splitting her time between Siebert AdvisorNXT and Muriel Siebert & Co., LLC, both under the Siebert Financial Corporation umbrella. Siebert AdvisorNXT provides investment management primarily to individuals, including high-net-worth clients, as well as families, trusts, and certain business entities. The firm utilizes a web-based wealth management platform and combines algorithmic portfolio construction with access to third-party managers and specialty strategies, managing a substantial portion of assets on a non-discretionary basis.

Gary Gonzalez is a financial advisor with Siebert AdvisorNXT, LLC, holding a Series 66 designation and 24 years of industry experience. He has worked at Muriel Siebert & Co., Inc. since 2018 and previously spent 12 years at Stockcross Financial Services, Inc. Gonzalez splits his time equally between Siebert AdvisorNXT and Muriel Siebert & Co., both under the Siebert Financial Corporation umbrella. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through its web-based AdvisorNXT program and access to third-party sub-advisors. The firm employs mean-variance optimization based on Modern Portfolio Theory, utilizing ETFs and ETNs, and combines algorithmic portfolio construction with dedicated advisor support.

Andrew Mcdonald is an investment advisor representative at Siebert AdvisorNXT, LLC with 42 years of industry experience. He has been with Muriel Siebert & Co., Inc. since 2017 and has concurrently worked at StockCross Financial Services since 2007. Mcdonald holds Series 63 and Series 65 licenses. Outside of his advisory roles, he has established a real estate holdings business, A & C Properties LLC. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through its web-based AdvisorNXT program. The firm utilizes algorithmic portfolio construction based on Modern Portfolio Theory, implemented mainly with ETFs and ETNs, and offers both discretionary and non-discretionary management options.

Donato Cuttone Jr. is a financial advisor with Siebert AdvisorNXT, LLC. He holds Series 63 and Series 65 designations. Siebert AdvisorNXT primarily serves individuals, including high-net-worth clients, as well as families, trusts, and certain business entities. The firm combines an algorithmic, Modern Portfolio Theory-based approach to portfolio construction with access to third-party managers and specialty strategies such as a covered-call transition strategy.

Justin Carter is an investment advisor with Siebert AdvisorNXT, LLC, holding a Series 66 designation and one year of industry experience. He previously worked at Muriel Siebert & Co., LLC and FNB. Carter has a diverse background that includes roles in education and landscaping prior to his financial services career. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through a web-based platform that combines algorithmic portfolio construction with access to third-party managers and dedicated advisor support. The firm offers both discretionary and non-discretionary account management and features strategies such as covered-call transitions for concentrated holdings.

Brett Sonzogni is a financial advisor at Empower Private Wealth with eight years of industry experience. He holds a Series 66 designation and has previously worked at B. Riley Wealth Advisors, National Asset Management, and United American. Outside of his advisory role, Sonzogni is CEO of Social Sound Club LLC, a music production and entertainment company. Empower Private Wealth provides family-office style financial planning and consulting primarily to high-net-worth and accredited investors, focusing on oversight of private placements and alternative investments through a non-discretionary, monitoring-only approach.

John Moran is a financial advisor at Siebert AdvisorNXT, LLC with experience dating back to 2014. He holds a Series 66 designation and has worked at several firms including Muriel Siebert and Co. LLC, Millennial Advisers LLC, Allied Millennial Partners, and New York Life Insurance. Prior to his advisory roles, Moran held positions at SUNY Geneseo, AMC Networks, and Xavier High School. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through its web-based AdvisorNXT program and access to third-party sub-advisors. The firm’s portfolios utilize mean-variance optimization and are implemented mainly with ETFs and ETNs, combining algorithmic portfolio construction with optional dedicated advisor support.

Colin Mc Donald is an investment advisor representative at Siebert AdvisorNXT, LLC with four years of industry experience. He holds Series 63 and Series 65 licenses and has worked at Muriel Siebert & Co., Inc. since 2021. Prior to that, he held roles at Cushman & Wakefield and CBRE. Outside of his advisory role, he is a partner in a family real estate business where he manages tenant relations and markets rental units. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through a web-based platform that utilizes mean-variance optimization and offers a combination of automated portfolio construction with dedicated advisor support. The firm operates wrap-fee programs and collaborates with third-party sub-advisors, managing accounts on both discretionary and non-discretionary bases.

Ronald Roberts is a financial advisor with Siebert AdvisorNXT, LLC, holding a Series 63 designation and 36 years of industry experience. He has worked at Muriel Siebert & Co., LLC since 2020 and previously spent 18 years at Stockcross, Inc. Roberts is a dual employee of Siebert AdvisorNXT and Muriel Siebert & Co., LLC, both under the same parent company, Siebert Financial Corporation. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through a web-based platform that integrates algorithmic portfolio construction with access to third-party sub-advisors. The firm offers discretionary and non-discretionary management options and features strategies such as a covered-call transition plan and a combination of automated portfolios with dedicated human advisor support.

Natasha Howe is an investment advisor at Siebert AdvisorNXT, LLC with five years of industry experience. She holds Series 63 and Series 66 licenses and has worked primarily at Muriel Siebert & Co., Inc. since 2019. Siebert AdvisorNXT provides investment advisory and portfolio management services mainly to individual and high-net-worth clients through its web-based AdvisorNXT program, which combines algorithmic portfolio construction using mean-variance optimization with access to third-party sub-advisors and dedicated investment representatives.

Alec Stevenson is an investment advisor with Siebert AdvisorNXT, LLC., holding Series 63 and Series 65 licenses and five years of industry experience. He has worked at Siebert AdvisorNXT and Muriel Siebert & Co., Inc. since 2020. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through its web-based AdvisorNXT program, which uses algorithmic portfolio construction combined with human advisor support. The firm operates wrap-fee programs and offers discretionary and non-discretionary account management with access to third-party sub-advisors.

Dean Bantis is an investment advisor representative with Siebert AdvisorNXT, LLC, holding Series 63 and Series 65 licenses and bringing 10 years of industry experience. He has worked at Spartan Capital Securities LLC since 2017 and previously at Dawson James Securities. He splits his time between Siebert AdvisorNXT and Muriel Siebert & Co., both under the Siebert Financial Corporation umbrella. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through a web-based platform that combines algorithmic portfolio construction with optional dedicated advisor support. The firm offers both discretionary and non-discretionary management, utilizing ETFs and ETNs within strategies informed by Modern Portfolio Theory.

Mario Didomenico is a financial advisor with Siebert AdvisorNXT, LLC, holding Series 63 and Series 66 licenses and bringing 31 years of industry experience. He has worked at Muriel Siebert & Co., Inc. since 2018 and previously at StockCross Financial Services and Summit Brokerage Services Inc. He also provides non-investment-related consulting through DiDomenico Associates, LLC. Siebert AdvisorNXT offers investment advisory and portfolio management services primarily to individual and high-net-worth clients, using a web-based platform that combines algorithmic portfolio construction with access to third-party managers and dedicated advisor support.

Barbara Villella is a financial advisor with Siebert AdvisorNXT, LLC, holding Series 63 and Series 66 licenses and bringing 24 years of industry experience. She has worked at firms including Muriel Siebert & Co., Inc., LV Capital Partners, LLC, and Peterson Investments. Outside of her advisory role, she is a franchise owner of Dream Vacations and operates a cruise-related business through an LLC. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through a web-based platform that combines algorithmic portfolio construction with access to third-party sub-advisors and dedicated investment adviser representatives. The firm offers both discretionary and non-discretionary account management and features strategies such as covered-call transitions and a blend of automated and human advisory support.

Kevin Ocana is an investment advisor with Siebert AdvisorNXT, LLC, holding Series 63 and Series 66 licenses and nine years of industry experience. He has worked at Muriel Siebert & Co., LLC since 2025 and previously held roles at UBS Financial Services, Morgan Stanley, and Merrill. He divides his time between Siebert AdvisorNXT and Muriel Siebert & Co., LLC, both under the Siebert Financial Corporation umbrella. Siebert AdvisorNXT provides investment advisory and portfolio management services primarily to individual and high-net-worth clients through a web-based platform that combines algorithmic portfolio construction with optional dedicated advisor support. The firm offers both discretionary and non-discretionary management, utilizing ETFs, ETNs, and third-party managers, and features strategies such as covered-call transitions for legacy holdings.