Our People

Leadership is the driving force behind the service-oriented philosophy of Leone, McDonnell & Roberts

Leadership Team

The partners and professionals of Leone, McDonnell & Roberts, Professional Association share the common traits of thorough professionalism and unquestionable integrity. Individually, each one brings their own nuances of expertise to the table for our clients. Their leadership is the driving force behind the service-oriented philosophy of Leone, McDonnell & Roberts.

To learn more about our firm’s leadership team, click on the names below for a biographical summary of each individual:

  • John (“Jack”) D. Callahan, Jr. President, Managing Partner

    Jack joined Leone, McDonnell & Roberts, Professional Association in 1985 and currently serves as the firm’s Managing Partner.

  • John J. Daigneault Treasurer, Partner

    John joined Leone, McDonnell & Roberts, Professional Association in 1988 and was admitted to the firm’s partner group in 2000.

  • Paula J. Daley DePlanche Vice President, Partner

    Paula joined Leone, McDonnell & Roberts, Professional Association in 1988 and was admitted to partnership in 2005.

  • Roger L. Hamel Vice President, Partner

    Roger joined Leone, McDonnell & Roberts, Professional Association in 2002. He is well-known throughout the firm for his listening skills.

  • Thomas W. Roberts Vice President, Partner

    Tom joined Leone, McDonnell & Roberts, Professional Association in 1987 and currently works in the firm’s Wolfeboro and North Conway offices.

  • Evan J. Stowell Secretary, Partner

    Evan joined Leone, McDonnell & Roberts, Professional Association in 2002 following his college graduation.

  • David J. Verno Vice President, Partner

    Dave joined Leone, McDonnell & Roberts, Professional Association in 2002 and was invited to become a partner in 2008.

  • Shauna I. Brown Partner

    Shauna joined Leone, McDonnell & Roberts, Professional Association in 2006 and was appointed Vice President, Partner in 2016.

  • Peter R. Ventura Principal

    Peter has been a member of the Leone, McDonnell & Roberts, Professional Association team since 2003.

  • Tavia D. Cederberg Manager

    In her role as manager, Tavia oversees work performed by the firm’s staff level employees, such as audits, reviews, compilations and tax preparation.

  • Joseph F. Quinn, Jr. Manager

    Joe currently works out of the firm’s Stratham, NH office, where he is responsible for managing client relationships and staff. He also oversees client development.

  • Christopher J. McKay Manager

    Chris joined Leone, McDonnell & Roberts, Professional Association in 2009 and currently serves as one of the firm’s Managers.

  • Angela M. Zakon Supervisor

    Angela joined the Leone, McDonnell & Roberts, Professional Association team in 2008 and currently serves as Supervisor in our North Conway office. Her areas of expertise include audit, reviews, and compilation services within the nonprofit sector as well as tax preparation and planning.

  • Brieanna Pettengill Supervisor

    Brieanna first joined Leone, McDonnell & Roberts, Professional Association in 2011. As a Supervisor in our Dover, NH branch, Brieanna taps into her exceptional attention to detail and organizational talents to manage many of our firm’s non-profit, HUD, and low-income housing audits.

  • Diane P. Stowell Supervisor

    Diane joined Leone, McDonnell & Roberts, Professional Association’s Dover office in 2001. As a branch Supervisor, she leverages her 25+ years accounting experience to manage audits, review and compilations, and tax services for LMRPA clients.

  • Jason Gaskell Supervisor

    Jason launched his career Leone, McDonnell & Roberts, Professional Association in 2009 after graduating from UNH – and he’s been with us ever since! As Supervisor in our Dover, NH location, Jay partners with individuals and organizations to prep, manage, and oversee a multitude of personal and business accounting needs.

  • Laura O’Keefe Supervisor

    Laura joined Leone, McDonnell & Roberts, Professional Association in 2016 at our Stratham, NH branch. In her role as Supervisor, Laura thrives on the bustle and pace of tax management season, assisting our clients with their preparation and management needs.

  • Lynn E. Kasch Supervisor

    Lynn has been with Leone, McDonnell & Roberts, Professional Association since 2002. As Supervisor in our Wolfeboro, NH location, Lynn pretty much does it all, but she specializes in single audits, trusts, estate, and all things taxes.

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