During the 1990s, Dr Marshall trained and worked as a litigation solicitor at the international law firms Herbert Smith (now Herbert Smith Freehills), and Freshfields, Bruckhaus Deringer. Since 2003, when she completed her doctorate, she has been a full-time academic lawyer and is now a Professor in the law school at the University of Leicester.
Jill is the author of three books on legal theory, justice and human rights: Human Rights Law and Personal Identity (Routledge June 2014); Personal Freedom Through Human Rights Law? Autonomy, Identity and Integrity under the European Convention on Human Rights (Martinus Nijhoff, 2009) and Humanity, Freedom and Feminism (Ashgate, 2005).
The overarching theme of her work analyses legal issues surrounding personal freedom and identity, applying philosophical and moral theory to case law and statutes. Her current research is investigating a so-called human right to personal identity, and includes how the environment we live in shapes who we are.