Sisti Law Offices
We are a criminal defense law firm with powerful resources available to help our clients.


OUR Attorneys



Mark L. Sisti was born in Buffalo, NY and raised primarily in Buffalo and Baltimore, MD. Mark obtained his B.A. from Canisius College in 1976 and his J.D. from UNH Law in 1979. Mark is also a fellow in the American College of Trial Lawyers and has been named to the NH Best Lawyers for the past ten (10) years in the areas of white-collar criminal defense and non-white collar criminal defense.

Mark has tirelessly defended the rights of citizens and non-citizens when faced with their most difficult problems for forty (40) years. Mark has focused on defending those accused of State and Federal crimes since 1979. After graduation from UNH Law, he worked for the NH Public Defender, where he eventually was named to the Homicide Defense Project in 1982. He was the Deputy Director of the NH Public Defender from 1985 through 1988.

In 1988, Mark began his private practice as a founding partner with Twomey & Sisti Law Offices; which has evolved into Sisti Law Offices. It is a statewide practice that dedicates itself to State and Federal Criminal Defense.

Mark has been involved in thousands of jury trials and bench trials, and represented individuals in every county in New Hampshire at every level, including over 100 individuals charged with homicide and more than his share of high-profile cases since his career began in 1979. He also appears in the NH Supreme Court regularly. Mark is a member of both the New Hampshire and Vermont State Bars. He is also admitted in the Federal District Court of New Hampshire and Vermont, as well as the 1st Circuit Court of Appeals.



B.A. - Canisius College - Buffalo, NY - 1976

J.D. - University of NH - Concord, NH - 1979 (formerly Franklin Pierce Law Center

Activities & Affiliations

  • Has appeared for clients in New Hampshire, Vermont, Massachusetts, Maine, New York, Wisconsin, Florida, California, Washington DC, Maryland, Colorado, Ontario and Quebec

  • NH Association of Criminal Defense Lawyers

  • Vermont Bar Association

  • VT Association of Criminal Defense Lawyers

  • American Bar Association

  • American College of Trial Lawyers

  • National Association of Criminal Defense Lawyers

  • Best Lawyers of America - Criminal Defense

  • Super Lawyers of New England - Criminal Defense

  • NH Magazine-Best Lawyers - Criminal Defense

  • 2004 Champion of Justice - NHACDL

Bar Admissions

  • NH Bar Association - 1979

  • US District Court-NH - 1979

  • 1st Circuit District Court-NH - 1980

  • Vermont Bar Association - 2004

  • US District Court-VT - 2004




Alan J. Cronheim has been a member of the New Hampshire Bar since 1975. He came to New Hampshire after graduating from the Cornell Law School and after being awarded a Reginald Heber Smith Community Lawyer Fellowship to work at New Hampshire Legal Assistance. While at Legal Assistance, he was a staff attorney and managing attorney of the Portsmouth office. He was also litigation director for the statewide program, supervising and assisting with major litigation in New Hampshire's Federal and State Courts.

Alan joined the New Hampshire Public Defender Program in 1981. As a Public Defender, he handled all varieties of criminal cases, including misdemeanors, felonies and homicides in the District and Superior Courts.

 In 1989, Alan opened the Portsmouth office of Sisti Law Offices. He continues to focus on criminal defense issues ranging from motor vehicle and misdemeanor offenses, felonies and murder. He successfully argued in the New Hampshire Supreme Court that New Hampshire's then existing death penalty statue was unconstitutional.

Alan has been named to the list of New Hampshire's Best Lawyers for criminal defense by Woodward- White for the last seventeen years.  In 2015, he was selected as “Lawyer of the Year” in the area of criminal defense. He has been recognized as a “Champion of Justice” by the New Hampshire Association of Criminal Defense Lawyers and served as President of NHACDL. Alan has received the Bill of Rights Award from the New Hampshire Civil Liberties Union for his work protecting voting rights in New Hampshire and has been recognized for his work on behalf of the developmentally disabled by NH-ABLE.

Alan has been an instructor for continuing legal education programs administered by the New Hampshire Association of Criminal Defense Lawyers, the New Hampshire Bar Association and the Office of the Attorney General. He served sixteen years on the New Hampshire Supreme Court Professional Conduct Committee. He is a member of the New Hampshire and New York Bars and is a member of the New Hampshire Association of Criminal Defense Lawyers, the New Hampshire Bar Association and The National Association of Criminal Defense Lawyers.




B.A. University of Rochester, with honors - 1972
J.D. Cornell Law School - 1975

Activities & Affiliations

  • NH Association of Criminal Defense Lawyers

  • National Association of Criminal Defense Lawyers

  • Best Lawyers of America - Criminal Defense

  • NHACDL - Champion of Justice

  • Served as President and Board Member of NHACDL

  • NH Civil Liberties Union - Billof Rights Award

  • 2015 Lawyer of the Year - NH Best Lawyers

  • NH Supreme Court Professional Conduct Committee (1998-2014)

Bar Admissions

  • New Hampshire -1975

  • New York - 1976


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Colin Sandiford has been with the firm since March of 2015.  He graduated from Mississippi State University in 2001 with a degree in Political Science.  After moving to Norwich, Vermont in 2009, he attended Vermont Law School where he participated in the school’s first Criminal Law Clinic.  After graduating from Vermont Law School in 2013, Colin and his family moved to the Concord area where he volunteered with the Disability Rights Center.  He has also served as a member of the NH Bar Association’s “New Lawyers” Committee where he assisted with the Committee’s community service project in spring of 2018.



B.A. - Mississippi State University - 2001

J.D. - Vermont Law School - 2013

Activities & Affiliations

  • Disability Rights Center

  • NHBA “New Lawyers” Committee

Bar Admissions

  • NH Bar Association - 2014

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Wade Harwood has been a criminal defense attorney for more than a decade.  An experienced trial lawyer, Wade has handled all kinds of cases from motor vehicle violations to homicides.  In addition to defending criminal charges in courts throughout the state, he has experience handling post-conviction matters, DMV hearings, and appeals to the New Hampshire Supreme Court. Prior to joining Sisti Law Offices, Wade spent nine years as a staff attorney with the New Hampshire Public Defender.  As a member of the Public Defender’s litigation support team, he conducted statewide training on defending drug cases and advised lawyers throughout the state on defense strategies in their drug cases.  Wade received a Bachelor of Music from Bowling Green State University and a J.D. from New York University’s School of Law, where he was a staff editor on the Environmental Law Journal.


B.M. - Bowling Green State University - 2002

J.D. - NY University’s School of Law - 2006

Activities & Affiliations

NH Association of Criminal Defense Lawyers

Bar Admissions

  • NH Bar Association - 2006