Parker E. Thoeni




Parker E. Thoeni

Phone: 410-843-3466
Fax: 410-752-8861

Parker Thoeni represents management in employment litigation in state and federal courts, and in administrative proceedings before federal, state, and local administrative bodies.  Parker also provides advice and counsel to employers regarding personnel matters.

Parker litigates a broad range of labor and employment disputes; he focuses the majority of his time on litigation involving employee mobility (common law tortious interference and non-competition and non-solicitation agreements), confidentiality agreements and trade secrets, as well as wage and hour class and collective actions.  Parker advises clients on all aspects of the employment relationship, including employee leave, reasonable accommodations, discrimination, harassment, and retaliation, wages and hours, restrictive covenants, executive employment agreements, misappropriation of confidential, proprietary, and trade secret information, and development of personnel policies.  Parker routinely oversees and conducts internal investigations and provides both management and employee training on a variety of labor and employment laws.  Parker has been a frequent speaker on medical marijuana in the workplace, as well as LGBTQ workplace rights.  Parker represents employers in a variety of industries, including healthcare and pharmaceuticals, construction, professional services, food services, and manufacturing.

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Before joining Shawe Rosenthal, Parker worked for a national labor and employment law firm.  Parker began his career with the federal government representing management in labor and employment disputes.

Parker received his B.A. in Mathematics from Franklin & Marshall College and his J.D. from American University Washington College of Law, cum laude, where he was an editor of the Business Law Brief, a member of the Moot Court Honor Society Executive Board, and the Director of the National High School Moot Court Competition.

Practice Areas

  • Unfair Competition, Restrictive Covenants and Trade Secrets Litigation
  • Wage and Hour Compliance and Litigation
  • Employment Litigation, including complex Class and Collective Actions
  • Discrimination, Harassment and Retaliation
  • FMLA/ADA/Workers’ Compensation Leave Management
  • Whistleblower Actions
  • Human Resources Advice and Counseling
  • Personnel Policies, Procedures and Handbooks
  • Grievance and Labor Arbitration


  • Chambers and Partners (Up and Coming), 2020
  • Best Lawyers (Litigation- Labor and Employment), 2020
  • Super Lawyers (Rising Stars), 2016-2018
  • Department of Justice Public Service Award, 2012


  • American Bar Association
  • Maryland State Bar Association


  • American University Washington College of Law, J.D., cum laude, 2008
  • Franklin and Marshall College, B.A., 2005

Bar Admissions

  • Maryland and District of Columbia
  • United States District Court for the District of Maryland
  • United States Courts of Appeals for the Fourth Circuit



Parker E. Thoeni Quoted in Law 360 Article Regarding CMS Vaccine Rule

Parker E. Thoeni and Preston (Pete) Heck Successfully Advocate for Company Against Former Employee Who Violated Non-Compete Agreement

Best Lawyers in America© Honors Shawe Rosenthal

All Shawe Rosenthal Attorneys Recognized by Super Lawyers©

Parker E. Thoeni and Courtney B. Amelung won a motion to dismiss

Parker E. Thoeni and Courtney B. Amelung presented a webinar on “Maryland Case Law Trends” to the Baltimore chapter of the Association of Corporate Counsel

Shawe Rosenthal Authored the Maryland chapter of Lexology's “Employment: North America” Guide

Shawe Rosenthal authored the USA Trends and Developments chapter of Chambers’ Employment 2021 Global Practice Guide

We are delighted to announce that all of our partners were listed in The Best Lawyers in America© 2022, an extremely rare accomplishment

Parker E. Thoeni was named a co-leader for the Employment Law Alliance’s Trade Secrets and Restrictive Covenants group

Parker Thoeni and Lindsey White authored “Employer Mandatory Vaccination Policies in the Time of COVID-19: Practical Considerations for Employers, Particularly Those in Healthcare”

Webinar: “The 'New Normal' of Remote Work? What Employers Need to Know" presented by Fiona Ong and Parker Thoeni

Best Lawyers in America© Includes Eleven Shawe Rosenthal LLP Partners In Its Inaugural 2021 Edition

Parker E. Thoeni Was A Guest Speaker For An Employment Law Alliance Podcast

Shawe Rosenthal has been ranked in the top tier of Maryland labor and employment firms for the eighteenth consecutive year by Chambers USA: America’s Leading Lawyers for Business

Parker E. Thoeni was a guest speaker for the Employment Law Alliance’s podcast series, Episode 246: The Ban on Non-Compete Agreements in the District of Columbia

Teresa D. Teare presented a webinar, “Vaccinations in the Workplace: A Legal Perspective”

Teresa D. Teare and Parker E. Thoeni won summary judgment on a former employee’s claims against an insurance company

Parker E. Thoeni, Lindsey A. White, and Chad M. Horton presented a webinar, “The COVID-19 Vaccine is Here: What’s Next for Employers?”

Best Lawyers Honors Shawe Rosenthal

Employer Mandatory Vaccination Policies in the Time of COVID-19: Practical Considerations for Health Care Employers Article

FFCRA Paid Leave Mandate Revised, DOL Reaffirms its FFCRA Regulations: What attorneys and employers need to know

Best Lawyers Honors Shawe Rosenthal Attorneys

Parker Thoeni to Present at LifeSpan Network's Annual Conference

Mark J. Swerdlin and Parker E. Thoeni Authored an Op-Ed, “What the new overtime proposal could mean for businesses.”

Parker E. Thoeni and Lindsey A. White Won a Dismissal

Complimentary Webinar – Transgender Issues in the Workplace

Parker E. Thoeni authored an article, “NLRB Notice of Proposed Rulemaking on Joint Employment: 'We Reject Maintaining the Status Quo’”

Victory – Teresa Teare and Parker Thoeni Win Dismissal of Case

Mark Swerdlin and Parker Thoeni Win Dismissal of Federal Discrimination Case Webinar – “Marijuana in the Workplace.”

Super Lawyers Recognizes Shawe Rosenthal Attorneys

Article – "Is Setting Pay Based on Prior Salary the Same as Setting Pay Based on Sex?"

Victory - Parker E. Thoeni Won a Case for a Manufacturing Client in Federal Court

Webinar – "Managing Cancer and Other Chronic Diseases in the Workplace."

Victory. Teresa D. Teare and Parker E. Thoeni were successful in defending an FLSA wage and hour and wrongful discharge case in the U.S. District Court for the District of Maryland.

Victory. The U.S. Court of Appeals for the 4th Circuit affirmed a summary judgment victory that Parker E. Thoeni won on behalf of a casket company

Victory. Bruce S. Harrison, Mark J. Swerdlin and Parker E. Thoeni won a motion for summary judgment on behalf of a non-profit organization

News – Update on Persuader Lawsuit

Article – "Trump DOL Asks For More Time In Persuader Rule Cases"

Article - "Discrimination based on sexual orientation: Not the "principal evil" but protected by Title VII nonetheless?"

Victory. Mark J. Swerdlin and Parker E. Thoeni won a motion to dismiss on behalf of a credit union

Nine S&R Attorneys selected for Super Lawyers Annual List

Shawe Rosenthal and Seven of Our Individual Attorneys Recognized by Super Lawyers

Webinar The Transitioning Legal Landscape of Transgender Workplace Rights What Employers Need to Know

Webinar: Navigating New Legal Developments on Same-Sex Marriage, Transgender Rights, and Pregnancy Discrimination: What Employers Need to Know

Teresa D. Teare and Parker E. Thoeni were quoted in a recent article in the Baltimore Business Journal

Making Sure Employment Decisions Comply with the Law.

Mark Swerdlin and Parker Thoeni Won A Motion to Dismiss on Behalf of Transportation Company