Tammy Martin

General Counsel at CASTELLUM, INC.

Net worth: 12 746 $ as of 2026-05-30

61 year

48 connections

Communications

Consumer Services

Consumer Non-Durables

Profile

Ms. Tammy L.
Martin is a Secretary & Chief Accounting Officer at MobilePro Corp.
and a Secretary & General Counsel at Castellum, Inc. Ms. Martin was previously employed as a General Counsel by Americangreetings.com, Inc., a President & Chief Executive Officer by Davel Communications, Inc., and a Secretary & Chief Administrative Officer by PhoneTel Technologies, Inc. She received her undergraduate degree from Baldwin-Wallace College and a graduate degree from Cleveland State University.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
CASTELLUM, INC. 0.02%	2026-06-30	15,031 ( 0.02% )	12 746 $	2026-05-30

Tammy Martin active positions

Companies	Position	Start
CASTELLUM, INC.	General Counsel	2025-12-31
MobilePro Corp. MobilePro Corp. Wireless TelecommunicationsCommunications Provides integrated wireless data, internet portal and wireless services	Comptroller/Controller/Auditor	2012-11-19

All active positions of Tammy Martin

Former positions of Tammy Martin

Companies	Position	End
Davel Communications, Inc. Davel Communications, Inc. Specialty TelecommunicationsCommunications Provides payphone services	President	2009-01-19
PhoneTel Technologies, Inc. PhoneTel Technologies, Inc. Specialty TelecommunicationsCommunications Owns, operates, and installs public pay phones	Chief Administrative Officer	-
Americangreetings.com, Inc. Americangreetings.com, Inc. Consumer SundriesConsumer Non-Durables Designs, makes, and sells everyday, seasonal, and personalized greeting cards	General Counsel	-

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Training of Tammy Martin

Experiences
Positions held

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Private companies

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Linked companies

Private companies	7
PhoneTel Technologies, Inc. PhoneTel Technologies, Inc. Specialty TelecommunicationsCommunications Owns, operates, and installs public pay phones	Communications
Davel Communications, Inc. Davel Communications, Inc. Specialty TelecommunicationsCommunications Provides payphone services	Communications
MobilePro Corp. MobilePro Corp. Wireless TelecommunicationsCommunications Provides integrated wireless data, internet portal and wireless services	Communications
Americangreetings.com, Inc. Americangreetings.com, Inc. Consumer SundriesConsumer Non-Durables Designs, makes, and sells everyday, seasonal, and personalized greeting cards	Consumer Non-Durables
Baldwin-Wallace College Baldwin-Wallace College Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Cleveland State University Cleveland State University Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Castellum, Inc. Castellum, Inc. Chemicals: Major DiversifiedProcess Industries Develops water treatment and sanitization technologies	Process Industries