Colleen Bannon

Colleen Bannon is the Chief Operating Officer of Marshall Dennehey and a shareholder in the firm. Colleen leads all of the firm’s administrative departments and her deep knowledge of the firm’s operations are supported by her former positions as director of human resources and the director of litigation support.

For many years Colleen was also a practicing attorney, focusing on privacy and data security and representing numerous medical providers, retailers, e-commerce and public entity clients in data breach actions. She is also a highly experienced employment law attorney who has defended clients in discrimination, civil rights and public entity liability matters.

With a deep background in litigation support and information technology, Colleen also successfully led the firm’s E-Discovery program. In this capacity, she worked closely with other attorneys in the firm to provide their clients with cutting-edge legal advice and guidance in this complex area of law. Her understanding of technology applications was significant to her employer and business owner clients, particularly when dealing with exposure in privacy and data security.

She has spoken at numerous conferences, as well as internal seminars, on the topics of electronic discovery in litigation, social media in the workplace, and privacy and data security. She was an author for The Labor Report, a monthly publication of the Pennsylvania Chamber of Business and Industry, which features articles on employment law issues including sexual harassment, disability and racial discrimination.

Colleen has a storied history with the firm. She began employment with Marshall Dennehey Warner Coleman & Goggin as a member of the firm's support staff in 1980. While continuing full-time employment, first as an administrative assistant and then as an applications specialist within the firm's IT department, she obtained her Bachelor of Arts degree, magna cum laude, from Holy Family College in 1992. She then went on to receive her juris doctor from Temple University School of Law in 1996.

Thought Leadership

Marshall Dennehey Announces C-Suite Promotions and a New Director of Human Resources

March 1, 2020
Marshall Dennehey announced today that Colleen M. Bannon, Esq., former Director of Human Resources, has been promoted to Chief Operating Officer of the firm, succeeding Liz Brown who is now Senior Advisor of Operations Management until her retirement at the end of the year. Additionally, former Director of Finance, Frank S. Stransky, CPA, has been named the law firm’s first-ever Chief Financial Officer. The firm also welcomes Karen Williams, MBA, PHR, SHRM-CP, as its new Director of Human Resources.

Colleen Bannon and Diana Cortes Appointed Co-Chairs of Philadelphia Bar Associations Federal Courts Committee

February 15, 2017
Marshall Dennehey attorneys Colleen Bannon, Shareholder and Director of Legal Information Resources, and professional liability associate, Diana P.

Colleen Bannon Appointed Vice-Chair of the Philadelphia Bar Associations Federal Courts Committee

Privacy and Data Security
December 21, 2015
Colleen Bannon, Shareholder and Director of Legal Information Resources, has been appointed a Vice-Chair of the Philadelphia Bar Association's Federal Courts Committee.

On The Pulse ... Marshall Dennehey Invests in Technology to Benefit Clients

Philadelphia - Headquarters
March 1, 2015
As Director of Legal Information Services at Marshall Dennehey, I frequently speak to our 485 attorneys about ways they can use technology to provide innovative and cost-efficient legal services to our clients. Defense Digest, Vol. 21, No. 1, March 2015

Classes/Seminars Taught

Using Technology to Find Facts Fast, Insurance Carrier's 2017 Panel Counsel Summit, May 8 - 10, 2017

The Many Considerations Pertaining to the ESI 30(b)(6) Witness, International Association of Defense Counsel, Construction Law Committee, Annual Meeting, 2008

E-Discovery Law Update, Pennsylvania Defense Institute Annual Meeting, 2007

Electronic Data: When Delete Does Not Mean Goodbye, PLRB Claims Conference, 2006 Annual Meeting

Electronic Discovery and the Federal Rules of Civil Procedure, Manufacturers Alliance/MAPI, 2006