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

Contact Information

Phone: 603-433-8639

Address:
1 Autumn Street
Portsmouth, NH 03801

Sarah E. Desiderio

P.E. – President

Sarah graduated from the University of New Hampshire in 2000 with a B.S. in Civil Engineering. While working full time, Sarah obtained a M.S. in Engineering, Structural degree from the University of Massachusetts Lowell in 2004. Sarah earned her professional license in October 2006. Sarah was with JSN from 2004-2015 and returned in April 2018. Sarah is licensed in NH, MA, ME, NY, CT, RI.

603-433-8639 ext. 211

email: sarah(at)jsneng.com

Direct Line (603) 766-4898

Matthew J. Allen

P.E. - Vice President

Matt graduated from the University of New Hampshire in 1993 with a B.S. in Civil Engineering. Matt joined JSN in June of 1995. Matt earned his professional license in April 2000. Matt is licensed in NH and MA.

603-433-8639 ext. 203

email: matt(at)jsneng.com

Direct Line (603) 766-4892

Roger V. Brown

LEED AP– Project Designer

Roger has been Project Designer with JSN since 1990.

603-433-8639 ext. 208

email: roger(at)jsneng.com

Direct Line (603) 766-4891

Chuck Tinkham

P.E. - Senior Structural Engineer

Chuck earned his professional license in April of 2012 and joined JSN in May of 2012.

603-433-8639 ext. 210

email: chuck(at)jsneng.com

Direct Line (603) 766-4894

Charlie Bardwell

E.I.T. Structural Engineer

Charlie joined the team at JSN in February 2018.

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

Lisa joined the team at JSN in January 2004

603-433-8639 ext. 201

email: Lisa(at)jsneng.com

Direct Line (603) 766-4888

JSN Associates, LLC

Consulting Structural Engineers

One Autumn Street, Portsmouth, NH

603-433-8639

Mary Hansen

Bookkeeper

Mary has been with JSN since 1993 (603) 433-8639

Get In Touch.

If you are interested in working with JSN, send us an inquiry and we will get back to you as soon as we can!

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