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About me

I work with clients ranging from established businesses or entrepreneurs to clients who need family law help to navigate the assorted legal issues they face. Before joining Shannon Law Office, I ran my own firm and worked in the litigation department of Winthrop & Weinstine in Minneapolis.

I have familiarity with the Americans with Disabilities Act, divorces, corporate governance issues, non-compete agreements, warranties, contract disputes, and a variety of other issues that affect clients of all types. I’m licensed in both the federal and state courts of Minnesota and the Western District of Wisconsin, and have argued in front of the Minnesota Court of Appeals, Minnesota State District Court, and the U.S. District Court for the District of Minnesota, as well as appeared in various administrative proceedings and arbitrations.


Photos and videos

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Practice areas


  1. Lawsuits & Disputes: 30%
    5 years
  2. Divorce: 30%
    5 years
  3. Employment: 20%
    5 years
  4. Personal Injury: 10%
    5 years
  5. Child Custody: 10%
    5 years


Payment types:

Cash, Check, Credit card

Attorney endorsements

2 total 

Are you an attorney? Endorse this lawyer

  • John Spyros Fotopoulos

    I endorse this lawyer.


    John Fotopoulos Personal injury Attorney
    Relationship: Fellow lawyer in community

  • Alexander Nicholas Loftus

    Derek is a rare commodity in big law: he is creative and personable. I highly recommend him for the most complex matters.


    Alexander Loftus Litigation Attorney
    Relationship: Worked together on matter

Contact info

Shannon Law Office, LLC

24 East Main Street
Evansville, WI, 53536


WIGood Standing201501/21/2015
MNNot Authorized - Non-payment of fees201107/15/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
North Star LawyerMinnesota State Bar Association2013
North Star LawyerMinnesota State Bar Association2012
Work experience
TitleCompany nameDuration
AttorneyShannon Law Office2014 - Present
OwnerLaw Office of Derek Allen2014 - 2014
Litigation AttorneyWinthrop & Weinstine2011 - 2014
Association namePosition nameDuration
State Bar of WisconsinMember2015 - Present
Minnesota State Bar AssociationMember2011 - Present
Children's Law Center of MinnesotaAttorney for Foster Children2011 - 2013
Legal cases
Case nameOutcome
Marvin Lumber v. Sapa Extrusions (964 F. Supp. 2d 993)Settlement after favorable summary judgment order
North Dakota v. HeydingerThe U.S. district court, at our client's request, overturned a Minnesota statute and awarded attorneys' fees to our client
See all legal cases 
Publication nameTitleDate
DuetsblogVarious Blog PostsN/A
School nameMajorDegreeGraduated
Beloit CollegeRhetoric & DiscourseBA - Bachelor of ArtsN/A
University of Chicago Law SchoolN/AN/AN/A