Marc Seelenfreund

No open positions remaining

Net worth: 2 $ as of 30/07/2026

57 year

44 connections

Electronic Technology

Consumer Services

Industrial Services

Profile

Marc Seelenfreund was the founder of Accel Telecom Ltd. (founded 2003) and served as Chief Executive Officer from 2004 to 2015.
Mr. Seelenfreund is the founder of Signifi Mobile, Inc. (founded 2015) and serves as Chief Executive Officer since 2015.
Mr. Seelenfreund was the founder of Siyata Mobile, Inc. (founded 1986) and served as Chairman, President & Chief Executive Officer from 2017 to 2021.
Mr. Seelenfreund is the founder of Core AI Holdings, Inc. (founded 1986) and serves as Director since 2025.
Mr. Seelenfreund is the founder of Siyata PTT, Inc. (founded 2022) and serves as Chief Executive Officer & Director since 2026.
Current job includes Chairman at Ono Academic College.
Former jobs include Chief Executive Officer at Accel Solutions Group Ltd. from 2004 to 2015, Independent Director at Advent Technologies Holdings, Inc. from 2024 to 2025, and Vice President at Sunrise Corp.
(New York).
Education includes graduate degree from Bar-Ilan University.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
0%	14/05/2026	4 ( 0% )	2 $	30/07/2026

Marc Seelenfreund active positions

Companies	Position	Start
Ono Academic College Ono Academic College Other Consumer ServicesConsumer Services Functions as a College/University	Chairman	-
Signifi Mobile, Inc. Signifi Mobile, Inc. Telecommunications EquipmentElectronic Technology Manufactures wireless communication equipment	Chief Executive Officer	30/06/2015

All active positions of Marc Seelenfreund

Former positions of Marc Seelenfreund

Companies	Position	End
ADVENT TECHNOLOGIES HOLDINGS, INC.	Director/Board Member	28/10/2025
Accel Telecom Ltd. Accel Telecom Ltd. Miscellaneous Commercial ServicesCommercial Services Operates as a communications consulting, importing, distribution and development firm	Chief Executive Officer	30/06/2015
ACCEL SOLUTIONS GROUP LTD	Chief Executive Officer	30/06/2015
Sunrise Corp. (New York) Sunrise Corp. (New York) MiscellaneousMiscellaneous Operates as an non-classified establishment	Corporate Officer/Principal	-
SIYATA MOBILE	Chief Executive Officer	-

See the detail of Marc Seelenfreund's experience

Training of Marc Seelenfreund

Experiences
Positions held

Active

Inactive

Listed companies

Private companies

See the detail of Marc Seelenfreund's experience

Connections

1st degree connections

1st degree companies

Male

Female

Members of the board

Executives

See the personal network

Linked companies

Private companies	8
Accel Solutions Group Ltd. Accel Solutions Group Ltd. Environmental ServicesIndustrial Services Imports, distributes and integrates communication equipment	Industrial Services
Bar-Ilan University Bar-Ilan University Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Ono Academic College Ono Academic College Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Accel Telecom Ltd. Accel Telecom Ltd. Miscellaneous Commercial ServicesCommercial Services Operates as a communications consulting, importing, distribution and development firm	Commercial Services
Siyata Mobile, Inc. Siyata Mobile, Inc. Telecommunications EquipmentElectronic Technology Develops and provides cellular communications solutions	Electronic Technology
Signifi Mobile, Inc. Signifi Mobile, Inc. Telecommunications EquipmentElectronic Technology Manufactures wireless communication equipment	Electronic Technology
Sunrise Corp. (New York) Sunrise Corp. (New York) MiscellaneousMiscellaneous Operates as an non-classified establishment	Miscellaneous
Advent Technologies Holdings, Inc. Advent Technologies Holdings, Inc. SemiconductorsElectronic Technology Operates as an advanced materials and technology development company which develops, manufactures and assembles hydrogen fuel cell components	Electronic Technology