- Overview
Trusted with complex, high-stakes investigations where neutrality, credibility, and defensible outcomes matter.
NY | NJ | PA | CA
Oppenheimer Investigations Group (OIG) is a premier, bicoastal investigations-focused law firm serving private companies, educational institutions, public agencies, and their counsel. We do not litigate nor provide advice and counsel, though many of us have done that work in previous careers.
Organizations engage us when allegations are complex, leadership is involved, organizational trust is at stake, or findings may later face scrutiny from counsel, boards, regulators, courts, media, or the public.
Our Attorney Investigators determine the facts through fair, impartial investigations designed to produce credible, legally defensible findings that leaders can trust.
Why OIG
Insight | Integrity | Impartiality
Investigations are our focus.
We are not a litigation, labor and employment, or advice-and-counsel firm. We work collaboratively with counsel without competing for their broader client relationships.
Experience where the stakes are high.
Our attorneys bring deep experience handling sensitive matters involving senior leaders, complex allegations, institutional dynamics, and significant internal or external scrutiny.
Practical, responsive, human.
We combine rigorous fact-finding with practical judgment and thoughtful handling of the people and organizations involved.
What We Investigate
- Workplace misconduct
- Harassment
- Discrimination
- Retaliation
- Fraud and financial misconduct
- Title IX and school matters
- Law enforcement and fire service matters
- Other complex and sensitive allegations
Explore our services.
OIG on the East Coast
OIG has Attorney Investigators serving clients throughout New York, New Jersey, Pennsylvania, Georgia, California, and nationally.
Our East Coast presence formally launched in early 2026 when OIG joined forces with Tribu Partners and its founder, longtime tri-state workplace investigator Elizabeth “Beth” Gramigna.
Need an Impartial Investigator?
Whether you’re counsel seeking an investigator for a client or an organization navigating a sensitive matter, we’d be glad to talk.
Every investigation begins with a conversation.
