World Trade Center Institute
- A private, nonprofit organization financed jointly by the State of Maryland and private sector business, dedicated to educating and connecting Maryland to the globe.
- http://www.wtci.org/

Greater Baltimore Technology Council
- Harnesses the local technological, investment, educational, governmental, and entrepreneurial resources to grow a strong technology community.
- http://www.gbtechcouncil.org/

AMA Baltimore
- Local Chapter of the American Marketing Association.
- http://baltimore.marketingpower.com/

PMI Baltimore Chapter
- A nonprofit organization educating project managers and promoting professionalism in project management. Find news, events, education and membership information.
- http://www.pmibaltimore.org/

Baltimore Development Corporation
- A 501(c)(3) corporation contracted with the City of Baltimore to provide economic development services. Find initiatives, development activities and assistance information.
- http://www.baltimoredevelopment.com/

Baltimore City Chamber of Commerce
- Promotes businesses to maximize business and economic development. Find member directory and information, resources and events.
- http://www.baltimorecitychamber.com/

Baltimore Business & Social Club
- A social business event club. Find membership and event information.
- http://www.baltimoresocialclub.com/

MIT Enterprise Forum of Washington-Baltimore
- Non-profit networking organization dedicated to the entrepreneur community. Features events and membership information.
- http://www.mitef.org/

Association of Information Technology Professionals (AITP)
- Baltimore Chapter encompassing the entire IT community; membership information, and event calendar.
- http://www.baltimore.aitp.org/

Association of Energy Engineers, Baltimore Chapter
- Promotes the scientific and educational interests of its members, and the community. Includes meeting dates and location, officers, and energy related issues.
- http://www.aee-baltimore.org/

National Association of African Americans in Human Resources, Baltimore Chapter
- NAAAHR Baltimore provides support and networking for its members through a range of programs and services, employment listings, contacts and links.
- http://www.naaahr-baltimore.org/

Association of Women in Computing (AWC), Baltimore, Maryland Chapter.
- Provides support and networking to women in information technology fields. Highlights include meeting calendar, chapter history, resource links, how to join, and membership benefits.
- http://www.awc-baltimore.org/