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Marshall DenneheyShare Holder
Teresa O. Sirianni
Pro

Teresa O. Sirianni

3.8
1 review

501 Grant Street, Suite 700, Pittsburgh, PA 15219

Public Entity and Civil Rights Litigation, Professional Liability, Employment Law and 2 more

About Teresa O. Sirianni

Teresa is a strong advocate for her employment law, civil rights and municipal liability clients. In her role as an experienced litigator, Teresa represents school districts, school leaders, municipalities, police departments and various non-profit and corporate entities, in claims made and suits brought against them. She appears regularly in both the state and federal courts, representing clients in suits brought against them involving Section 1983 claims, Title VII actions, ADEA, ADA, FMLA and PHRA matters.

When called on to represent and defend school leaders and school districts, Teresa’s experience and understanding in education law serve her clients well. She represents all types of education clients with a focus on Special Education Law, Due Process Student Rights, Bullying and Anti-Bullying Policies and Educator Due Process.

In addition to her experience as a litigator, Teresa represents employers and other professionals in various administrative matters; before the Pennsylvania Labor Relations Board, the National Labor Relations Board, the Pennsylvania Human Relations Commission, the Equal Employment Opportunity Commission, and multiple other administrative units including the Pennsylvania Department of Education, the Office for Dispute Resolution, the Office for Civil Rights and the State Ethics Commission. Teresa also consults with employers, school leaders and various types of public entities on matters including auditing, updating and revising personnel manuals and educational policies.

A member of the Allegheny County Bar Association, Teresa is recognized among The Best Lawyers in America for 2024 and 2025 in the areas of Litigation - Labor and Employment and was recognized as a Best Lawyer in 2025 in the area of Employment Law - Management. Notably, Teresa was also recently inducted as a fellow of the Academy of Trial Lawyers of Allegheny County, a community of trial lawyers committed to improving the civil trial process, preserving the jury system and enhancing the quality of trial advocacy in Allegheny County. Fellows must have significant trial experience and exhibit the highest levels of ethical standards and professionalism.

Teresa is admitted to practice before the United States District Court for the Western District of Pennsylvania and all Pennsylvania state courts.

Honors & awards

The Best Lawyers in America, Education Law
2026

The Best Lawyers in America, Employment Law - Management
2025-2026

The Best Lawyers in America, Litigation - Labor and Employment
2024-2026

Pennsylvania Super Lawyer Rising Star
2013

Year joined

2000

Thought Leadership

98 Marshall Dennehey Attorneys Recognized in the 2026 Editions of The Best Lawyers in America and the Best Lawyers: Ones to Watch in America

August 20, 2025
Marshall Dennehey is proud to highlight the firm’s 98 attorneys who have been recognized in the 2026 editions of The Best Lawyers in America and the Best Lawyers: Ones to Watch in America. Less than 6% of all practicing lawyers in the U.S.

Legal Update for Special Education Law - Case Law Update

Pittsburgh
Harrisburg
School Leaders' Liability
July 1, 2025
U.S. Supreme Court Clarifies Standard for Disability Discrimination Claims in Education Under Section 504 and ADA Legal Update for Special Education Law - July 2025 is prepared by Marshall Dennehey to provide information on recent legal developments of interest to

Teresa O. Sirianni Elected to Membership of the Academy of Trial Lawyers of Allegheny County

Public Entity & Civil Rights Litigation
Employment Law
School Leaders' Liability
July 31, 2024
Teresa O.

Legal Update for Special Education Law - Updates from the Pennsylvania Department of Education

Pittsburgh
School Leaders' Liability
June 1, 2024
Commonwealth Court voids Pennsylvania Department of Education’s newly imposed Age-Out Plan for failure to implement it in accordance with Pennsylvania Laws.* Legal Update for Special Education Law - June 2024

Legal Update for Special Education Law - Updates from the Pennsylvania Department of Education

Pittsburgh
School Leaders' Liability
April 1, 2024
Effective November 1, 2023, the Prior Written Notice for a Reevaluation and Request for Consent form were separated into into different forms, the Prior Written Notice for a Reevaluation form and the Request for Consent for a Reevaluation form.

Classes/Seminars Taught

A Primer on Pursuing and Defending Remedies and Damages, The Annual Allegheny County Bar Association's Labor and Employment Symposium, November 14, 2024

Employment Claims Involving Law Enforcement: Prepare to Defend, The Western Pennsylvania Chiefs’ of Police Association, November 19, 2021

Effective Practices for General Educators in Inclusive Classrooms, November 18, 2018

The Role of the General Educator in the Special Education Process, January 15, 2018

How A Student Can Make A Successful Return to School - Liabilities and Responsibilities - Concussion Presentation, February 28, 2014

Employment Liability in the Cyber Age, Marshall Dennehey / AIG Employment Seminar, Pittsburgh, PA, May 2, 2013

Employment in Crisis: Workplace Security & Lessons from the Sandusky Case, Marshall Dennehey, Erie, PA, October 11, 2012

Speaker on various topics involving employment claims and federal practice.

 

Teresa O. Sirianni (Pittsburgh, Pennsylvania) View website

Awards

Peer Reviewed Rated
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Client Champion Awards

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Champion Badge Silver

At least three reviews and a score of 4.0 or higher.

Champion Badge Gold

At least six reviews and a score of 4.2 or higher.

Champion Badge Platinum

At least ten reviews and a score of 4.5 or higher.

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Avvo Awards

Avvo Top Contributor

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Avvo Client Choice

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Reviews for Teresa O. Sirianni

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Overall Rating
3.8
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3.8
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Services

Areas of Law

  • Professional Liability
  • Other 4
    • Public Entity and Civil Rights Litigation
    • Employment Law
    • School Leaders' Liability
    • Premises and Retail Liability

Practice Details

  • Firm Information
    Position
    Shareholder
    Firm Name
    Marshall Dennehey
  • Representative Cases & Transactions
    Cases
    Significant Representative Matters: Successfully obtained a defense verdict following a jury trial in United States District Court for the Western District of Pennsylvania. Plaintiff alleged ADA (disability) discrimination
    retaliation, ADEA (age) discrimination
    ERISA retaliation regarding the elimination of his position in April 2018. Plaintiff's position was eliminated for the legitimate
    non-discriminatory or retaliatory reason of fulfilling full utilization of the company's fleet of tankers. Following a three-day trial, including witness testimony from seven individuals, a panel of seven jurors unanimously returned a verdict in favor of our client, a regional trucking company.
    Defense verdict for municipal employer against a former employee's claims that he was terminated in violation of the FMLA.
    Obtained summary judgment in federal court on behalf of a school district employer alleged to have violated the ADA when it terminated plaintiff's employment in violation of various school policies.
    Obtained an early dismissal of an employee's breach of contract claim wherein the employee alleged that the employer terminated his employment in violation of a union contract despite the employee's status as a probationary employee.
    Successfully defended a police chief
    municipal police department against plaintiff's claims of violations of his procedural
    substantive due process rights under the Fourteenth Amendment
    claims of defamation
    intentional infliction of emotional distress. Obtained summary judgment on all of plaintiff's claims following aggressive discovery.
    Obtained a complete dismissal of plaintiff's multiple civil rights claims on a motion to dismiss brought pursuant to the Fourth
    Fourteenth Amendments
    various other federal statutes against multiple police officers wherein Plaintiff claimed that the officers violated the knock
    announce rule by not announcing their presence prior to entering plaintiff's apartment
    arresting him.
    Summary judgment secured for a non-profit corporation against former employee's claim of constructive discharge
    allegations of disparate treatment, hostile work environment
    retaliation.
    Published Works: 'EEOC Guidance on the PDA: Has Anything Changed?' Defense Digest, Vol. 20, No. 4, December 2014

Experience

  • Bar Admission & Memberships
    Admissions
    2003, Pennsylvania
    2003, U.S. District Court Western District of Pennsylvania
    Memberships

    Associations & memberships

    Allegheny County Bar Association
    Academy of Trial Lawyers of Allegheny County

  • Education & Certifications
    Law School
    Thomas R. Kline School of Law of Duquesne University
    Class of 2002
    J.D.
    Other Education
    Pennsylvania State University
    Class of 1995
    B.S.

Contact Teresa O. Sirianni

Share Holder at Marshall Dennehey
3.8
1 review

Union Trust Building, 501 Grant Street, Suite 700Pittsburgh, PA 15219U.S.A.

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Fax: (412) 803-1188

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Attorneys FAQs

  • What year was this attorney first admitted to the bar?
    Teresa O. Sirianni was admitted in 2003 to the State of Pennsylvania.
  • Is this attorney admitted to practice in any U.S. Federal Courts?
    Teresa O. Sirianni is admitted to practice before the United States District Court for the Western District of Pennsylvania.
  • What law school did this attorney attend?
    Teresa O. Sirianni attended Thomas R. Kline School of Law of Duquesne University.

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