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Stephen T. Lam



Stephen Lam is a financial manager and CPA in the business of helping businesses grow and succeed. Along with business successes, passion for helping people is also Steve’s way of life. Steve helps many people with tax planning and investments to achieve their life goals. As a Rotarian, Steve helped others obtain the aid needed for their family and communities through various fundraising means.


Steve is a Rutgers University School of Business graduate and obtained his experience in accounting and auditing, as well as taxes at the Big 4, Mid-tier as well as Super-regional firms prior to branching out on his own. Steve also previously served as controller for manufacturing and healthcare organizations.


Aside from his Rotarian responsibilities, Steve strongly believes in the family structure and therefore has created a family-centric approach to the firm. Steve places the human aspect of service as his top priority from employees' flex time to take care of family, emergency leave, work from home and helping clients with issues beyond financial and taxes.

Jacqueline Matarazzo



Jacqueline is the firm’s Manager overseeing its 3 locations.  She serves as a tax accountant and auditor. Jacqueline is a graduate of Fairleigh Dickinson University earning both her Bachelor of Science and Master of Science degrees in Accounting.  She has extensive experience from mid-tier firms gaining knowledge in individual tax, corporate tax, pass through entities, estate tax and auditing. 


In addition, she advocates for clients in conflict resolution matters to resolve their tax and financial disputes with the IRS.  Jacqueline is a graduate of New York Law School serving also as Divorce and Matrimonial Mediator where she helps families and/or couples stay amicable even through the most painful of separations.


Lastly, Jacqueline is proud to serve as a Court Appointed Special Advocate at CASA SHaW helping children through difficult times.


Jennifer Lynn Serfass



Jennifer L. Serfass is a Senior Accountant at LAM CPAs. She joined our firm in 2016, but has over 14+ years of experience in public accounting firms.  She attended Kutztown College for business administration.  


Jenn works primarily in tax preparation for individuals and helping her clients with the day to day bookkeeping operations. She specializes in knowledge of QuickBooks and loves customizing the software to fit the client’s needs. 


Jenn grew up on a farm in Macungie, Pennsylvania with her parents and 2 siblings. She loves animals and has a dog and cat waiting for her at home. Jenn loves the ocean and grew up hunting, fishing and horseback riding. When Jenn’s not at work, she enjoys spending time with her son, Brandon, rooting for her favorite hockey team, The Lehigh Valley Phantoms and is always up for a good game of cards. 

Brandon Zweifel



Brandon Zweifel started working at LAM CPAs as a Staff Accountant in June of 2018. He has become well versed in corporate accounting as well as serving as the firm’s payroll specialist. Brandon graduated from Bloomsburg University of Pennsylvania in December of 2015 with a Bachelor's degree in accounting. He is currently in the process of obtaining his CPA license. 


In his free time, he enjoys: watching sports, going to the gym, and hanging out with friends. He is from Coopersburg, Pennsylvania.  

Beneta Letterman



Beneta Letterman started working at LAM CPAs in January 2019. Beneta graduated from Rutgers University with a Bachelor in Genetics but has always had a passion for administrative and project management roles. Her resume includes over 10 years of experience in marketing, design and overseeing project managment. Her diverse skill set is helpful in aiding in and handling our diverse team of: CPAs, accountants and client needs here at LAM CPAs.  


When she is not handling outsourcing projects or greeting clients at the firm, she loves spending time outdoors with her two favorite people, her son and daughter. They always keep her busy and laughing. Aside from running around with her kids, a good book or audio book will always be at her side. 


Sinead Twohig



Sinead joined Lam CPAs in August 2019 and brings with her 20 years of administrative experience. Before taking a career break and leaving Ireland for New Jersey, 

Sinead worked for Musgrave Group, one of Ireland's leading food retail and wholesale company in their Trading Dept. Building client supplier relationships, meeting deadlines and attention to detail for pricing databases and store interfaces were top priorities. 

In her free time Sinead loves to spend time with her family outdoors, hiking, camping and kayaking, She is a NJ State certified archery instructor since 2014 and an active member of a local 4h archery club along with her 3 children.  During football season Sinead is a member of the Warren Hills March Band pit crew and can be seen on the football field for all home and away games and all band competitions  - Go Streaks! Her favorite pastime is planning and organizing her next trip home to Ireland - Éirinn go Brách.

Phyllis Serfass



Phyllis has been a wonderful addition to the firm in the early part of 2019. She was formerly the executive secretary at Day-Timer’s before retiring in 2002.  Being bored and restless at home, Phyllis decided to come back to the workforce as our Front Office Administrator.  

Phyllis grew up on a farm in Macungie, Pennsylvania.  Her & her husband, Harold raised a variety of animals ranging from dogs, turkeys, chickens steers before finally settling on Thoroughbred race horses.  Phyllis loves football and can often be seen on a Friday night rooting for her alma mater the Emmaus High School Hornets. She has many hobbies like knitting, sewing, reading & especially baking: and often brings in tasty treats for the offices.  Phyllis also loves spending time with her 3 children and 3 grandchildren. She recently just celebrated her 54th wedding anniversary.