Yvonne McDuffie-Williams

Experienced Strategic Program Leader and Public Speaker

Yvonne McDuffie-Williams's profile photo
LocationLancasterCalifornia, United States
Current roleSuperintendentNon-Profit Organization · since Jun 2026
Government service22yrsInternal Revenue Service (IRS)

About

For the past 34 years, I have served the United States’ tax administration system, working as a federal employee with the Internal Revenue Service (IRS). My career has encompassed a diverse range of technical and management experiences.

I began my journey with the IRS as an Internal Revenue Agent, where I examined individual and business tax returns within the Small Business/Self-Employed division and later within the Large Business & International division. I conducted examinations independently and as a team member on large team audits. I progressed through the ranks, taking on various temporary assignments and permanent positions. These assignments and positions are highlighted below.

I formerly held the position as a Senior Program Analyst in the Small Business & Self-Employed division of the headquarters office.  The headquarters office is responsible for developing and implementing policies and standards for the entire division, implementing new tax laws mandated by Congress, and other responsibilities.  Working in headquarters is a fast-paced environment with almost daily time-sensitive projects and deadlines.  My leadership skills, attention to detail, and collaborative attitude have allowed me to take on increasing responsibilities over the years. I have received outstanding performance awards for successfully managing all programs and projects under my responsibility.

As an analyst, my primary responsibilities include leading multiple high-level programs simultaneously as a subject-matter expert.  For example, I have led the audit technique guide program, compliance programs covering real estate, farming, and entertainment industries, canceled debt income, tangible property, and limitation on business interest expense issues.  Additionally, I have been responsible for leading or co-leading tax implementation efforts for various federal tax law legislation provisions passed by Congress that have different effective dates.  Meeting deadlines is crucial when implementing new or revised tax law, as mandated by Congress.

I was competitively selected for a temporary assignment from January 2023 through May 2025 as a Senior Manager responsible for activities performed by Senior Program Analysts involved with tax implementation efforts of new tax law and a resource knowledge database. I also spearheaded the audit technique guide program and training for new analysts. I held daily collaborative meetings with my team for status updates and to mitigate solutions to issues. I addressed issues and found solutions through collaboration across the IRS and external stakeholders. I also led informational and training webinars delivered to external stakeholders.

As a Supervisory Internal Revenue Agent from 2003 through 2012, I oversaw and guided the work of Internal Revenue Agents and worked on short-term managerial assignments in other IRS offices and improvement projects.

Roles

Jun 2026–Present
Current role

Superintendent

Non-Profit Organization

Lancaster, California

Administrative

An important ministry in this religious organization is education. As the superintendent, I coordinate programs with the Bible school department, address teacher concerns, teach, lead newer teachers, order and distribute religious lessons to members and teachers, accounting functions, attendance, and other administrative duties. As a board member, I engage in meetings and identify actionable solutions.

Jan 2023–May 2025
Former role

Senior Manager - Program Manager

Internal Revenue Service (IRS), Small Business/Self-Employed

Program ManagerComplianceCommunicationsTax Law

Temporary assignment that ended due to budgetary contraints.

  • Led high-performing teams through the implementation of major tax legislation, including legislation with international tax implications. I maintained positive relationships, asked questions, analyzed information, and made daily decisions on actionable items.

  • Mentored employees in the development of tax issues, research, and investigative compliance work to address bad actors.

  • Reported legislative updates in concise and actionable formats for executives and other stakeholders.

  • Managed communication and planning for both short-term and long-term legislative transition strategies, prioritizing customer service.

  • Led federal compliance strategies and authored guidance related to audit technique guides for multiple Internal Revenue Code sections.

  • Delivered presentations on clean energy and residential tax credits at the 2024 IRS National Tax Forums, engaging over 350 tax practitioners and other attendees.

Nov 2016–Dec 2020
Former role

Consultant

Non-Profit Organization

Lancaster, California

AuditingAccountingAdministrativeForensics

Evaluated and assessed internal controls, record keeping, and books and records. Identified journal entry errors through tracing of invoices, receipts, job statements, and contracts to journal entries, identified errors, and embezzlement.

Shared findings and recommendations to address embezzlement, internal controls, segregation of duties and other best practices to reduce future risks to embezzlement, asset theft, and errors.

Aug 2012–Sep 2025
Former role

Senior Program Analyst

Internal Revenue Service (IRS)

California

Technical Writing and EditingEducationTax Examining
  • Led the audit technique guide program to ensure government online compliance rules were met. Link to guide:https://www.irs.gov/businesses/small-businesses-self-employed/audit-techniques-guides-atgs

  • Wrote and developed audit technique guides of various subjects used by thousands in the government, accounting, and tax industries.

  • Speaker at the IRS National Tax Forums to tax professionals.

  • Panelist on Tax Talk Today, a live online show in Washington, D.C., as a subject matter expert.

  • Provided technical guidance covering many Internal Revenue Code sections to internal and external stakeholders.

  • Developed and presented various tax topics during Continuing Professional Education courses, webinars, and small groups to internal and external stakeholders.

  • Developed various types of tax resources and products. Subject matter expert of various tax issues and Internal Revenue Code sections.

  • Mentored new analysts.

Aug 2012–Sep 2025
Former role

Internal Revenue Agent - Senior Program Analyst

Internal Revenue Service (IRS), Small Business/Self-Employed

Program AnalystTechnical TrainerTechnical Writing and EditingTechnical WriterComplianceTax LawTeacher / Professor
  • Regularly utilized tax research databases and internal resources to provide case resolution advice to examiners and other stakeholders.

  • Utilized Teams and other software for in-person and virtual presentations and meetings.

  • Ran and created analytical and planning reports for executives.

  • Authored a nationally distributed IRS audit technique guide on real estate foreclosure and cancellation of debt, widely used by thousands across government and private sectors.

  • Led effective teams through implementation of new and revised tax law as mandated by Congress for United States’ individuals, partnerships, corporations, S corporations, and tax-exempt organizations. Set milestones and due dates for teams’ planned action items.

  • Speaker at the IRS National Tax Forums, presenting to over 20,000 tax professionals on federal tax topics.

  • Panelist on Tax Talk Today, a Washington, D.C.-based live broadcast for tax professionals.

  • Successfully led an initiative to update tax law articles on over 2,000 webpages. By developing various tools, eliminated 40% of the content, thereby enhancing the end user-experience.

  • Established a mentoring program to preserve technical expertise due to an attrition rate of over 60%, successfully expanding coverage by 50 percent and increasing employee morale.

Jan 2007–Dec 2012
Former role

Head Treasurer

Nonprofit Organization

Mojave, California

AccountingManagementFinance

Volunteer Position

Addressed the budget and finances while working with the board administrators. Experienced with accounting, auditing, financial reconciliations, and reporting to the general conference.

Sep 2003–Aug 2012
Former role

Supervisory Internal Revenue Agent - Group Manager

Internal Revenue Service (IRS), Small Business/Self-Employed

California

AuditingAuditorComplianceManagement
  • Supervised Internal Revenue Agents who conducted audits across all business entity types, industries, specialty areas, and filing requirements.

  • Mentored employees in the development of tax issues, research, and investigative compliance work to address bad actors.

  • Significantly improved audit process efficiency and customer satisfaction by reducing average case time from 35% to under 20% within a remarkably short period.

  • Conducted nationwide evaluations of compliance managers and recommended changes based on my findings.

  • Participated on a nationwide team to improve examination processes.