Company Bios


bio photoDavid M. Kiley

David joined the firm in 2011. He is a licensed CPA in Massachusetts and enjoys proactively assisting clients in strengthening their strategic, accounting, and compliance positions while minimizing tax since 1994.

David has direct experience in tax preparation, assurance, and business advisory with various local industries including manufacturing, construction, retail, health care, import/export and professional services among many others.

Prior to joining OSG, David was a principal with a North Shore Massachusetts CPA firm. He graduated from the University of New Hampshire in Durham with a B.S. in Business Administration. He is affiliated with the AICPA and Massachusetts Society of CPAs and other local business and community based organizations.

David lives in Atkinson, New Hampshire with his wife and three children.

bio photoJoel Olbricht

After receiving the BBA from Abilene Christian University (Abilene, TX) in 1982, Joel also passed the CPA exam that year.

As the President & CEO of OSGroup, Joel's professional interests are many and varied. They include leadership, income and estate tax planning, business management and decision-making, strategic planning, building wealth, marketing, and technology planning.

Joel's professional affiliations include board positions with several organizations: Alexander Eastmen Foundation, NH Estate Planning Council, NH Society of CPAs, Derry (NH) Economic Development Council, Chester College of NE, and the Derry 21st Century Learning Community Corporation.

Joel spends his personal time with his wife and two children in addition to volunteering his time to local non-profit activities. He also enjoys photography, gardening, and US travel.

Professional Staff

bio photoGlenn J. DiBenedetto

Prior to the merger with OSG, Glenn was a principal with DiBenedetto & Company, PA for over 20 years.

Before that, Glenn was previously a manager with the international public accounting firm of Deloitte & Touche, LLP and had several years experience as a CFO for several public and private companies.

Glenn has extensive business advisory, tax, accounting and auditing experience. Glenn graduated from Bentley College with Highest Honors, is licensed as a CPA in the State of New Hampshire, and is a member of the American Institute of CPAs and the New Hampshire Society of CPAs.

Glenn enjoys various sports activities including tennis and bicycling.

bio photoTyler Hall

Tyler joined the OSGroup in January of 2016 as a recent college graduate. He graduated with honors from Southern New Hampshire University with a Bachelor of Science degree in Accounting. He is currently in the process of studying and sitting for the CPA exam and plans to pursue a Master’s degree.

In his spare time, he enjoys traveling, water skiing, ATVing, and visiting museums.

bio photoCrystal Middleton

Crystal joined the firm in 2014 with 11+ years of experience as a controller for a small manufacturing company and has experience in all aspects of accounting. She has a Bachelor of Science degree in Accounting from Southern New Hampshire University in is licensed in New Hampshire as a certified public accountant. Crystal is also a Quickbooks Pro Advisor.

She lives in Londonderry, NH and in her free time she enjoys the ocean, amusement parks and spending time with her husband and children.

bio photoSharon P. Moge

Sharon has over thirty years of experience in finance, tax and auditing. She has worked in the public accounting sector and has held senior finance and tax positions in both private and publicly traded companies.

Sharon has extensive experience in financial reporting, including business acquisitions and subsidiary consolidation, SEC reporting, stock option plan administration, federal and multi-state income and sales & use tax reporting, as well as financial and retirement plan auditing.

Sharon graduated in 1998 from Rivier College receiving her Bachelor Degree in Accounting. She is an associate member of the New Hampshire Society of Certified Public Accountants.

bio photoLandon Olbricht

Landon served active duty in the US Army from 2001 to 2005. He was deployed in Operation Iraqi Freedom from 2003 to 2004. In 2005, he joined OSGroup as a tax accountant.

Landon passed the special enrollment examination in August 2011 and was enrolled to practice before the Internal Revenue Service on November 3, 2011, earning the designation Enrolled Agent (EA). Landon is the Chief Technology Officer for OSGroup as well as our Charitable Gift Annuity Specialist.

Landon currently resides in Portsmouth, NH, where he enjoys cycling and homebrewing.

Administrative Support

bio photoKatherine A. Hamilton

Kathy has been with the firm for over 10 years and serves as an integral part of the administrative team.

She is married with one daughter and two dogs. Her personal time is spent enjoying her family and home, exercising and dog training.


bio photoN. Charles Santamaria

Prior to joining the firm in 2013, Charlie was a shareholder with a local CPA firm. He has more than forty years of extensive experience in the areas of accounting and auditing, financial management and reporting, individual and corporate taxation, and internal controls.

Charlie graduated from Bentley College with Highest Honors and has been a licensed CPA since 1972. He is a member of the American Institute of CPA’s and the New Hampshire Society of CPA’s.

During his personal time, he enjoys hiking, fishing, cross country skiing and snowshoeing.