Mark Willoughby

Pre-Litigation Attorney at Claggett & Sykes Trial Lawyers
Las Vegas, NV7 years experienceAdmitted 2018

About Mark Willoughby

Mark Willoughby is a Pre-Litigation Lawyer at Claggett & Sykes Trial Lawyers. A Las Vegas native, he transitioned to law after working as a commercial real estate agent for approximately three years, driven by his passion for advocacy and helping people in need.

Willoughby earned his Juris Doctor from Thomas Jefferson School of Law and his Bachelor of Arts in Business Administration from the University of San Diego. He has been licensed by the Nevada State Bar since 2018 and joined Claggett & Sykes in 2022.

Proven verdicts and settlements at Claggett & Sykes Trial Lawyers

These results are credited to Claggett & Sykes Trial Lawyers. A result appears under an attorney's own name only when a published source names them as counsel on the case.

A Utah judge entered a $951 million default judgment against Steward Health Care after newly trained nurses, an excessive Pitocin drip, and a delayed C-section at Jordan Valley Medical Center left a newborn permanently brain damaged.

Third District Court, Salt Lake City, Utah · 2025Medical MalpracticeRead the full story →

A Rio Arriba County jury held Acadia Healthcare and its New Mexico foster care subsidiaries responsible for placing an 8-year-old girl with a foster father who raped her repeatedly, returning one of the largest single-plaintiff sexual abuse verdicts in the country.

Rio Arriba County (First Judicial District Court), New Mexico · 2023Sexual AbuseRead the full story →

A 20-year-old painter suffered a traumatic brain injury in a 2021 ladder fall in Utah. A Denver jury found his workers' compensation carrier, NorGUARD Insurance, knowingly and unreasonably delayed and denied his care, including inpatient rehabilitation. It awarded $145.26 million, made up of $85.26 million in compensatory and $60 million in punitive damages.

Denver District Court, Denver, Colorado · 2025Workplace InjuryRead the full story →

A retrial jury in Utah's Fourth District Court awarded $81 million against Beacon Roofing Supply after one of its trucks struck and killed a 12-year-old boy who was crossing legally in a marked crosswalk.

Fourth District Court, Utah · 2026Truck AccidentsRead the full story →
$47 millionVerdictTop 20 in Nevada · #15

A Clark County jury found Amy Geiler's losses worth just under $47 million after hospital doctors raised her dangerously low blood sodium too quickly, causing permanent brainstem damage and locked-in syndrome.

Clark County District Court, Las Vegas, NV · 2023Medical MalpracticeRead the full story →

Prior results do not guarantee a similar outcome. Each case is unique and depends on its own facts.

Practice areas

Education

University of San Diego
Undergraduate

Bar admissions & credentials

State Bar of Nevada, admitted 2018

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Nevada Supreme Court Rules Overtime Counts as 'Full Wages' in Workers Comp Reopening Fight
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$15 Million Wrongful Death Verdict for Family of Man Killed by Speeding Driver in Las Vegas
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$38.6 million · A Soldier Shot in an Apartment Parking Lot, and a $38.6 Million Negligent Security Verdict
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Las Vegas Woman Develops Three Brain Tumors After Decades of Depo-Provera Injections

Prior results do not guarantee a similar outcome. Each case is unique and depends on its own facts.