Our Team
meet the team at JSN Associates
Jeffrey S. Nawrocki
P.E. – CEO
Jeff graduated from the University of NH in 1982 with a B.S. in Civil Engineering and has been practicing engineering since. After working in the precast industry for five years designing and constructing bridges, parking garages, and buildings, Jeff started the company in 1987 to develop a diversified engineering practice. Jeff is licensed in NH, MA, ME, NJ, VT
603-433-8639 ext. 206
email: jeff(at)jsneng.com
Direct Line (603) 766-4889

Sarah E. Desiderio
P.E. – President
603-433-8639 ext. 211
email: sarah(at)jsneng.com
Direct Line (603) 766-4898

Matthew J. Allen
P.E. - Vice President
603-433-8639 ext. 203
email: matt(at)jsneng.com
Direct Line (603) 766-4892
Roger V. Brown
LEED AP– Project Designer
603-433-8639 ext. 208
email: roger(at)jsneng.com
Direct Line (603) 766-4891
Chuck Tinkham
P.E. - Senior Structural Engineer
603-433-8639 ext. 210
email: chuck(at)jsneng.com
Direct Line (603) 766-4894
Charlie Bardwell
E.I.T. Structural Engineer
603-433-8639 ext. 213
email: Charlie(at)jsneng.com
Direct Line (603) 766-4875
Alden Blais
E.I.T. Project Engineer
Alden joined the team at JSN in June 2021.
603-433-8639 ext. 214
email: Alden(at)jsneng.com
Direct Line (603) 766-4896
Isabella A. Avila
E.I. Project Engineer
Isabella joined the team at JSN in August 2021.
603-433-8639 ext. 212
email: Isabella(at)jsneng.com
Direct Line (603) 766-4893
Nick A. Yenchek
E.I.T. Project Engineer
Nick joined the team at JSN in July 2023
603-433-8639 ext.209
Nick(at)jsneng.com
Direct Line (603) 766-4895
Lisa A. Rohr
Office Manager / Accounting / Insurance
603-433-8639 ext. 201
email: Lisa(at)jsneng.com
Direct Line (603) 766-4888
JSN Associates, LLC
Consulting Structural Engineers
603-433-8639
Mary Hansen
Bookkeeper