With courtroom successes for public companies, regional businesses, insurers, and entrepreneurs, Sig is a trial lawyer with more than twenty years of hearings to his credit, including jury trials in state and federal court, multi-week complex arbitrations, and high-stakes administrative hearings. In 2016, Sig won a $13.6 million jury verdict in a complex business case. He has been counsel of record in many state and federal reported judicial decisions, including more than thirty appeals.

Sig's environmental law practice includes toxic torts litigation, state and federal environmental enforcement defense, environmental damage and remediation claims, defense of natural resource damage claims, and land use litigation and appeals.

Active in securities disputes, Sig handles claims involving broker-dealers, securities fraud, and investment malpractice. He has participated as counsel in numerous Financial Industry Regulatory Authority (FINRA) arbitrations and in securities litigation in state and federal court.

In his media law practice, Sig represents the news media in First Amendment matters, defamation and privacy, state and federal freedom of information, newsgathering and cyber law. He has also served as counsel in copyright, trademark, and advertising matters.

Sig's experience also includes a range of complex state and federal litigation and appeals, including product liability claims, construction litigation, commercial litigation and arbitration, civil rights and constitutional litigation, professional liability disputes, and unfair trade practices, owner and shareholder disputes, and administrative claims.