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About

about US

S&O Construction Services, Inc. provides heating, air conditioning, ventilation and plumbing services to a broad range of industries throughout the Hudson Valley region of New York. S&O has successfully performed public work for 38+ years as an open shop contractor performing all phases of mechanical construction. Serving New York State, the Federal Government, local towns and municipalities, S&O specializes in work at correctional facilities, schools, military buildings, colleges, and water treatment plants.

Jeffrey B. Senft was the founder, president and CEO of S&O Construction Services.

OUR VISION

To be the mechanical industry bid/spec leader, locally owned, offering the highest degree of technical and operational efficiency for publicly funded projects. We will grow our company in a balanced, healthy way. This will allow us to provide our clients with results-focused solutions.  In addition, it will provide career opportunities for our employees with on-going challenges that fuel the passion behind our company.

OUR MISSION

To provide mechanical construction services that far exceed the expectations of high quality craftsmanship and workmanship that our clients expect and deserve.  S&O provides these services by offering technical and operational expertise, safe practices, and the highest level of mechanical construction, on time and within budget.

By building long term relationships, S&O continues to help our clients solve their most challenging problems.

S&O is committed to providing a career-oriented environment which encourages our entire team to challenge themselves through personal improvement, while continuing to build a strong, healthy company.

CORPORATE PARTNERSHIPS
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S&O Construction is a proud member of the Dutchess County Regional Chamber of Commerce, the Northeastern Subcontractors Association and the Associated Builders and Contractors, Inc.

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S&O Construction had the honor of being awarded as the Th!nk Dutchess Alliance for Business Large Business of the Year in 2019!

Projects

HIGHLIGHT PROJECTS

Below is just a very small sampling of our most recent projects. Click here for the full list of our NYS OGS jobs.

HVAC+R

VA MEDICAL CENTER MONTROSE CAMPUS

REPLACE SITE STEAM LINES

NYS OGS: CHATHAM DOT

PROVIDE MAINTENANCE SUB-HQ

BREWSTER CSD HIGH SCHOOL

PROVIDE HS FITNESS CENTER

NYPA: FISHKILL CORRECTIONAL FACILITY

REPLACE CHILLERS, RMU & ADMIN

NYS PARKS: NEW WINDSOR CANTONMENT HISTORIC SITE

HVAC UPGRADES

ULSTER COUNTY BOCES

I.S. BUILDING RENOVATION

NYS OGS: DELMAR FISH & WILDLIFE BUILDING

PROVIDE ADDITION

PLUMBING

NYS OGS: POLICE ACADEMY

REPLACE HOT WATER STORAGE SYSTEM

 

NYS OGS: EMPIRE STATE PLAZA
REPLACE DRINKING FOUNTAIN CHILLERS

DUTCHESS COUNTY 22 & 60 MARKET STREET

BATHROOM RENOVATIONS

SOJOURNER TRUTH STATE PARK

FACILITY IMPROVEMENTS

NYS PARKS: FAHNESTOCK STATE PARK

PROVIDE NORTH CAMPGROUND SHOWERS

DASNY: NATHAN KLINE INSTITUTE

PROVIDE WATER TREATMENT SYSTEMS

NYS OGS: CAMP SMITH TRAINING SITE

PROVIDE SELECTIVE TRAINING HOUSING

FEATURED PROJECT

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NYS Clean Hand Sanitizer Bottling System

 

When the pandemic started back in March 2020, New York State designated an emergency job to construct a fully functional and operating hand sanitizer bottling system at Shawangunk Correctional Facility.

 

S&O was awarded this job as a prime contractor, and thanks to a collaborative effort with OGS Region 3, DOCCS, Environmental & Fueling Systems, Hudson Valley Electrical C&M, Arold Construction and others, we spearheaded the operation to successfully complete the system within five days

Photos courtesy of NYS OGS Region 3

Building Under Construction

WORK WITH US

Download and fill out our job application, 

then click here to email it to us

Apply

contact

FULL ADDRESS

11 Charles Street

Pleasant Valley, NY 12569

Tel: 845-635-2916

Fax: 845-635-2977

ADMINISTRATIVE STAFF

Devin Knox   |   President

Roger Flouton   |   Project Manager

Raymond Klotz   |   Project Manager

Lars Andersen   |   Project Manager

Bob Grossman   |   Senior Estimator

Eric DeRise   |   Estimator

Dina Nargi   |   Office Manager

Aimee Grossman   |   Controller

Jessica Snyder   |   A/R

Kristen Lloyd   |   A/P

Madison Tighe   |   Submittal Coordinator

Justin Owen   |   Drafter

Aidan Mahoney   |   Drafter

Ian Mackay   |   Fabrication Shop

Alex van Eeden   |   Warehouse

Contact

© 2026 S&O Construction Services, Inc. All rights reserved.

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