Sacks Tierney P.A.

Member of Meritas: 173 full-service law firms serving more than 200 markets worldwide


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David Tierney and Sharon Shively rank #1 in ADR by Ranking Arizona


Ranking Arizona #1 in ADR for 2017

Sacks Tierney's ADR practice, led by David Tierney, Sharon Shively (above) and Greg Gillis, is ranked #1 among all Arizona law firms by Ranking Arizona for 2018

Greg Gillis




 Mediation and Arbitration

Arbitration and mediation are familiar ground for Sacks Tierney's veteran litigation attorneys, including members of three American Arbitration Association (AAA) panels.

Sacks Tierney is a Best Law Firms selectee for Arbitration (Metro Tier 1) and Mediation (Metro Tier 2)

In addition to serving on some of AAA's most sought-after arbitration panels, Sacks Tierney attorneys regularly appear as advocates in arbitrations (or mediations) under AAA rules, or in State Court arbitrations convened under an arbitration agreement.

  • David Tierney is a past chair of the State Bar’s ADR Section and in four separate years has ranked among Super Lawyers’® top 50 Arizona attorneys. A veteran litigator, he is experienced in mediating and arbitrating a broad range of matters. David serves on AAA’s Commercial and Construction arbitration panels and Construction Mediation Panel. He and has been listed in The Best Lawyers in America® since 2006.

  • Sharon Shively, a 10-time Super Lawyers selectee and 11-time Best Lawyers selectee, frequently serves as a mediator, settlement conference judge and arbitrator in complex, multi-party matters. Sharon is a member of two of AAA’s top arbitration panels – Commercial and Construction – and is experienced in matters involving construction, creditors’ rights, real estate and general commercial disputes.

  • Greg Gillis offers extensive experience with AAA and other alternative dispute resolution providers in cases ranging from $50,000 to $10 million in claims, including claims arising out of construction defects, breach of construction contracts, change order disputes, prompt pay disputes, breach of warranty, indemnity/contribution claims, payment bond claims, architect and engineer professional negligence claims. Greg's commercial experience includes disputes arising out of sales of businesses and failed mergers, real estate purchase and lease disputes, escrow and title insurance disputes, boundary and homeowner association disputes, lender/borrower disputes, breach of fiduciary duty and misrepresentation claims and secured transaction disputes.

Sacks Tierney arbitrators are experienced in matters involving construction law, commercial law, divorce and family law, creditors' rights, medical practice disputes, real estate valuations, contract clause disputes, and other important areas. Our attorneys serve as single-lawyer arbitrators or as settlement conference judges for State Court proceedings.


Trends in Arbitration and Mediation Case Law, Local and National (2016)

Arbitration in Arizona: Changes Have Arrived (2013)