Audit, Assurance & Consulting Services at Assurance Dimensions

Our Firm

Assurance Dimensions

Assurance Dimensions, LLC has grown from a regional firm to a leading national provider of audit and assurance services. Together with AD Advisors, LLC, we offer assurance and advisory services to private, public, and nonprofit clients throughout North America and internationally.

We understand what businesses and nonprofits want and need— reliable financial information along with practical advice and clear communications.

To ensure our clients receive the highest quality of service, we hire experienced professionals from some of the world’s largest firms.

Our Mission

Who We Are

Our Vision is to be a firm recognized for our commitment to delivering consistent, outstanding professional client service through our focus on processes and excellent team culture.

Our Vision can only be accomplished through our Mission: to provide our clients with an unparalleled service experience with quality expertise.

Our goal is to be a reliable resource to our clients anytime they need us.

We believe that open communication and sound research are essential to providing our clients with the best possible service. Our team is passionate about client success, and we are dedicated to serving and improving our community.

Our Mission

What We Value

To be a firm recognized for our commitment to delivering consistent, outstanding professional client service through our focus on processes and excellent team culture.

Quick Facts


  • Founded in 2008
  • Over 60 employees and growing
  • 10 CPAs and 2 Chartered Accountants, including Partners/Directors
  • Matthew “Matt” C. McNamara, Managing Partner
  • Serving private and publicly held companies, broker-dealer firms, and nonprofits
  • Licensed in most states, Canada, and the U.S. Virgin Islands
  • Servicing hundreds of clients annually

Firm Leadership

Matthew “Matt” C. McNamara, CPA, CISA

Chief Executive Officer at AD Advisors, LLC
Partner at Assurance Dimensions, LLC


Matt McNamara serves as the firm’s Managing Partner. He has over 20 years of experience as a Certified Public Accountant, providing audit and advisory services to business owners, executives, and boards of directors. 

Before founding Assurance Dimensions in 2008, Matt had an extensive career at two of the world’s leading accounting firms, Arthur Anderson and Grant Thornton. 

As a senior manager at Grant Thornton, Matt led both PCAOB, private equity, and venture capital engagements and managed key relationships in its portfolio. 

He specializes in SEC, and private company audits in the following industries: technology, manufacturing, retail, construction, nonprofit, and transportation.

Education & Certifications 

  • Master of Science in Accounting, University of Florida
  • Licensed Certified Public Accountant (CPA)
  • Certified Information Systems Auditor (CISA) 

Activities & Memberships 

  • American Institute of Certified Public Accountants (AICPA)
  • Florida Institute of Certified Public Accountants (FICPA)
  • Works with Junior Achievement and Leukemia Lymphoma Society
  • Graduate of Leadership Tampa Bay
(813) 610-3983

Bennie Lewis, CPA

President, Partner at Assurance Dimensions, LLC


Bennie Lewis serves as the firm’s President. He specializes in private company audits, PCAOB engagements, and retirement plan audits. He also has experience in internal audits, IPO preparation projects, and SOX engagements. 

Bennie is also the firm’s practice leader in nonprofit and single audit services. 

Prior to joining Assurance Dimensions in 2009, he worked for one of the world’s largest accounting firms, Grant Thornton, where he worked with audit and consulting teams servicing a wide variety of privately held businesses and nonprofit organizations. 

His industry experience includes private equity, technology, manufacturing, service industries, medical, retail, construction, REALTOR associations, and various nonprofit businesses.

Education & Certifications

  • Bachelor of Science in Accounting, University of South Florida
  • Licensed Certified Public Accountant (CPA)

Activities & Memberships 

  • American Institute of Certified Public Accountants (AICPA)
  • Florida Institute of Certified Public Accountants (FICPA)
  • Annual sponsor of the National Association of Veterans’ Research and Education Foundations (NAVREF) Conference
  • Graduate of Leadership Tampa Bay, 2016-2017
(813) 461-6266

Scott Mattson, CPA

Partner at Assurance Dimensions, LLC


Scott Mattson is an Audit Partner at Assurance Dimensions, LLC. He has over 20 years of experience as a Certified Public Accountant. 

Scott spent over a decade as an assurance principal at The LBA Group, one of the largest firms in Florida. He also served as assurance director at BDO USA LLP, one of the ten largest accounting firms in the world.  

Scott specializes in employee benefit plan audits, franchise financial reporting, and assurance work for non-public companies in multiple industries.

Education & Certifications

  • Bachelor of Science in Business Administration, Florida State University 
  • Licensed Certified Public Accountant (CPA)

Activities & Memberships 

  • American Institute of Certified Public Accountants (AICPA)
  • Florida Institute of Certified Public Accountants (FICPA)
  • Treasurer, Goodwill Industries of North Florida
(813) 461-6266

Batul Abdulali, ACA

Principal at Assurance Dimensions, LLC


Batul Abdulali is a Principal at Assurance Dimensions, LLC. She is responsible for providing audit services to a wide variety of the firm’s public companies and SEC-registered broker-dealers

Batul has over 13 years of experience providing audit, review, and business advisory services to privately held and publicly traded businesses in various industries, including pharmaceutical, medical equipment, IT, telecommunications, oil and gas, and waste management.

Batul joined Assurance Dimensions in 2017 after an extensive career as a senior audit associate at the Big Four accounting firm KPMG.

Education & Certifications

  • Bachelor of Arts (Honours) in Accounting, Business and Computer Science, University of Manchester, UK
  • Qualified Chartered Accountant

Activities & Memberships 

  • Institute of Chartered Accountants in England and Wales (ICAEW)
(813) 461-6266

Julian Sardinas, CPA

Partner at Assurance Dimensions, LLC


Julian Sardinas is a Partner at Assurance Dimensions, LLC,  where he is responsible for coordinating and supervising audits.

Julian manages and trains staff to deliver the highest professional service level and perform in accordance with the firm’s standards of excellence.

Julian has nearly 16 years of experience providing audit and accounting services to privately held and publicly traded businesses in multiple industries, including technology, financial lending, manufacturing, and professional service firms.

Before joining Assurance Dimensions, Julian served as a manager at Marcum LLP, one of the world’s largest accounting firms. 

His expertise includes public and private company audits, broker-dealer audits, surprise audits, quality of earnings, and employee benefit plan audits. 

Education & Certifications

  • Bachelor of Science in Finance, University of Miami
  • Master of Business Administration, Florida Atlantic University
  • Licensed Certified Public Accountant (CPA)

Activities & Memberships 

  • American Institute of Certified Public Accountants (AICPA)
  • Florida Institute of Certified Public Accountants (FICPA)
(813) 461-6266

Maria M. Sanjurjo, CPA

Partner at AD Advisors, LLC
Partner at Outsource Dimensions, LLC


In 2023, Maria joined Assurance Dimensions, LLC and is founder and managing member of Outsource Dimensions, LLC.

Maria has 25+years of diverse industry experience.  She spent 18 years in a regional public accounting firm providing audit, accounting, tax, and advisory services.  The accounting and advisory services include outsource accounting, technical accounting support, evaluating and enhancing the financial reporting processes and controls, as well as ensuring timely reporting.

Her industry expertise encompasses working with Registered Investment Advisors, Funds, Portfolio Companies, Management Companies, General Partner entities, Broker Dealers, Tech (Experienced/Start-Ups), Life Science, Not-For-Profit, Family Office, and Other Operating Companies.

Her operational excellence and strong leadership skills, as well as her ability to effectively communicate and collaborate with team members and clients enhances any team that she is a part of.

Maria graduated from Long Island University/C.W. Post with a Bachelor of Science Degree in Accounting. Maria holds a license as a Certified Public Accountant in the state of New York since 2003.

(631) 935-3870

Cell

(754) 800-3400

Office

Rachel Webster

Senior Manager


Rachel Webster is a Senior Manager at Assurance Dimensions and specializes in external audits for publicly and privately traded companies, and financial accounting and reporting.

Rachel has over ten years of experience providing audit and accounting services to privately held and publicly traded businesses in multiple industries, including nonprofit, health care and professional services firms.

Prior to joining Assurance Dimensions, Rachel served as a manager at CliftonLarsonAllen (CLA), the 8th largest national firm in the US.

Education & Certifications

  • Bachelor of Science in Communication, Ithaca College
  • Master of Accountancy, University of North Carolina at Charlotte
  • Licensed Certified Public Accountant (CPA)

Activities & Memberships 

  • North Carolina Association of Certified Public Accountants (NCACPA)
  • American Institute of Certified Public Accountants (AICPA)

Paul Goodyer

Senior Manager


Paul Goodyer is an Senior Manager at Assurance Dimensions and specializes in external audits for publicly and privately traded companies, financial accounting and reporting, and SOX audits.

As a practicing Chartered Accountant for over 10 years, Paul has worked at some of the world’s most prestigious Big Four accounting firms, including Ernst & Young and Deloitte. He also consulted with large corporations acting in Controller, SOX implementation, and management consulting positions.

Education & Certifications

  • Masters in Science in Chemistry, First Class, University of Nottingham, UK
  • Licensed Chartered Accountant (ACA)
  • Licensed Business and Finance Professional (BFP)

Activities & Memberships 

  • Institute of Chartered Accountants in England and Wales (ICAEW)
(813) 461-6266

Assurance Dimensions Headquarters

4920 W Cypress Street, Suite 102
Tampa, FL 33607

Contact Us

In certain states, Assurance Dimensions may be registered as McNamara and Associates, PLLC.