About the Firm

Welker Mojsej & DelVecchio combines the strength and versatility of three accomplished financial industry leaders to form a practice firmly grounded in fundamentals forged over a collective 75-plus years of experience, while embracing the technological tools that provide immense flexibility, options, and power to clients.

Started by Chris Welker in 2004 after he had gained invaluable experience at leading accounting firms, the practice gained quick traction. After ten years, Chris was ready to take the company to the next level and his longtime colleague and friend Rob Mojsej came aboard in late 2014. The growth continued, and in early 2016 a third colleague and accomplished finance professional, Anthony DelVecchio, joined as partner.

The dynamic of the three-member partnership has positioned WM&D as a leading CPA and consulting firm. Chris, Rob, and Anthony are all intimately familiar with the engines that drive the Western New York economy, each being raised in the area and graduates of the prestigious Rochester Institute of Technology.

In Memory of Gary Nacca

It is with sorrow that we note the passing of Gary Nacca in November 2022. Gary was well respected among his peers and had over 40 years of public accounting expertise. We were honored to work with Gary and will forever miss his professional guidance and, most of all, the personal connection we each shared with him.

Anthony G. DelVecchio, MBA, CPA, ABV

Anthony brings an extensive network to the firm across a wide swath of industries. He possesses a combined finance and accounting background and has excelled in a variety of roles in both public and private industry. His strength in diagnosing the challenges that companies face, be they related to start up, transition phases, or expansion obstacles, has saved clients innumerable amounts of time, energy, and capital. He is deeply experienced in accounting systems design and implementation, utilizing the latest technology to help clients transition to a cloud-based infrastructure.

Anthony’s skill in consultation coupled with his certification in performing Business Valuations provides clients with a clear understanding of their options as they contemplate growth through internal investment opportunities, succession plans, acquisitions, divestitures or open market sale strategies. He also leads the firm’s outsourced COO/CFO and Controller engagements.

Anthony is a Certified Public Accountant (CPA) with a designation of Accredited in Business Valuation (ABV) from the American Institute of Certified Public Accountants. Out of the office, Anthony can be found enjoying family time with his wife Renee and two children or keeping in shape on the ice hockey rink or golf course.

Christopher L. Welker, CPA

The founding member of WM&D, Chris’s vision was to build an accounting practice that was principled, profitable, and personable. He grew the company on a strong manufacturing base of clients. Much of his expertise now focuses on crafting high-end retirement plans and designing estate, trust, & succession plans for clients. He is currently a member of the New York State Society of Certified Public Accountants, the American Institute of Certified Public Accountants and the Estate Planning Council of Rochester. With over 30 years’ experience, Chris has the intuitive sense to quickly decipher the needs of clients, both individually and organizationally.

From Oakland to LA, back to Oakland, and now to Las Vegas, Chris has been a lifelong Raiders fan. While the NFL holds his strongest allegiance, he is an all-round sports enthusiast from the gridiron to the diamond, the rink and the court. He resides in West Henrietta with his wife of over 30 years, Marcia.  He is the proud father of two children, Kirstin and Stone. 


The general practitioner of the firm, Rob’s expansive knowledge of the financial industry perfectly positions him to navigate clients along their pathways at every life stage. He supports taxation needs in addition to providing audit, review, and compilation financial statement engagements. Rob holds a Series 7 Securities License as well as a Life & Health insurance License, providing clients a full array of investment and personal guidance.
Rob is a member of the American Institute of Certified Public Accountants. He has been blessed with the energy that allows him to devote time to the many clients who seek his counsel, while also serving on numerous non-profit boards. He is an active member of Hilton sports, RIT Soccer Alumni, and Robert Morris University Women’s Lacrosse. In between it all, he’s fervently rooting for his beloved Buffalo Bills. Rob lives in Hilton, NY with his daughters Haley & Audrey. 

Greg Gottorff Jr., CPA


Greg is a Certified Public Accountant (CPA) and seasoned finance professional with over 15 years experience in financial management and business processes across various industries. Greg excels in providing strategic financial insights, business process optimization, financial reporting and tax strategy optimization. His experience in external audit, internal controls, and mergers and acquisitions has proven invaluable to clients and organizations alike. Greg combines innovative technologies and strategies to offer customized solutions, empowering individuals, and businesses to make informed decisions and enhance their financial situations. His experience has been instrumental in driving client success and fostering a collaborative environment.

David Manioci, CPA

Senior Tax Associate

Dave is a licensed CPA with over 30 years’ experience serving individual as well as small to mid-sized businesses in the Rochester area.  In addition to providing tax and financial reporting services to his clients he prides himself on assisting his clients with their tax planning and wealth management goals.

Dave is a member of the American Institute of Certified Public Accountants.  One of Dave’s many interests is cooking.  He enjoys preparing meals and spending time with his wife Julie and two daughters.

Stone C. Welker

Staff Accountant

Stone graduated from SUNY Geneseo with a bachelor’s degree in accounting and is currently working toward NYS CPA licensure. After gaining valuable experience for a number of years at another Rochester-based CPA firm, he came onboard with WM&D. Stone has an uncanny ability to understand and articulate client needs. He finds great satisfaction in assisting people achieve the results they desire. Whether it be individual taxation, corporate taxation, or financial statement preparation, Stone provides a clear eye and steady counsel during stressful times.

Jamie L. DiGirolamo, EA


Jamie joined the firm in 2015 as a Staff Accountant and was promoted to Supervisor in 2019, along with obtaining the Enrolled Agent designation. She is experienced in preparing and reviewing income tax returns, representing clients in front of the IRS, preparing financial statements and supervising and mentoring staff. Jamie is an associate member of the New York State Society of Certified Public Accountants, a QuickBooks Pro Advisor and is pursuing her MBA in Accounting.

Amanda L. Michielson

Staff Accountant

Amanda joined WM&D as a staff accountant with her Bachelor of Science in Accounting from Saint John Fisher College. Before joining the firm, her previous experience includes individual and corporate tax preparation, bookkeeping and sales tax calculations. She is also certified as a Quickbooks Online Pro advisor.

Carolyn Dieter

Senior Tax Associate

Carolyn is a seasoned and highly skilled tax preparer with 34 years of experience. Known for her meticulous attention to detail and understanding of tax preparation, she has helped countless clients navigate the complexities of tax preparation and filing. Her commitment to providing exceptional service has earned her a loyal client base. Carolyn is known for her approachable and friendly demeanor, making the tax preparation process smooth and stress-free. She is dedicated to continuing education to stay current with the ever-changing tax landscape. Carolyn is also a certified Notary Public, offering additional services to our clients.

Miriam Powell

Senior Tax Associate

Miriam earned her Bachelor of Science in Business Management from Brigham Young University. While raising her five children, her interest in tax grew and became the focus of her career. She worked for another local CPA office before joining our firm in 2023. She focuses on individual tax return preparation. Miriam has a strong interest in tax planning and is currently pursuing a master’s degree in accounting.

Tracy Glass

Client Service Associate

Tracy plays a pivotal role in ensuring that our clients receive unparalleled support and service. She brings a wealth of experience and a passion for excellence to her role. With a commitment to delivering high-level support, Tracy excels in providing exceptional service to our clients, ensuring their needs are met with efficiency and professionalism. Known for her outstanding organizational skills, Tracy manages multiple tasks seamlessly, always prioritizing client satisfaction. Her ability to anticipate and address client needs has made her an invaluable member of our team.

Stephanie C. Leary

Client Service Associate

Stephanie is a native Rochesterian and a graduate of the Aquinas Institute. She went on to earn her Bachelor’s Degree in Social Work from SUNY Brockport. Stephanie applies her passion for helping others in her role as point of contact for the practice’s clients. She guides those who need assistance in navigating the ShareFile portal, ensuring a smooth and secure experience. Stephanie is a great asset to the team, supporting the preparers and making certain all tax returns and financial statements are assembled accurately.

Gary Nacca

Gary is a full-service accountant with over 40 years of public accounting. His wide range of experience makes him ideal to focus on the profitability and long-term growth of WM&D business clients. While Gary has worked with clientele across a broad swath of industries, he has worked extensively with construction and real estate professionals, providing the firm an additional source of expertise in these fields.