Skip to content
Logo of jrl holzmacher engineering featuring a stylized blue atomic symbol next to the company name written in sleek, modern fonts.
  • Services
  • Selected CapabilitiesExpand
    • Architectural Design
    • Architectural Engineering Support
    • Brownfields Site Investigation And Remediation Support
    • Construction Observation And Documentation
    • Denitrification Treatment (IA) Systems
    • Due Diligence Phase I & Phase II Environmental Site Assessments
    • Electrical Controls
    • Expert Testimony And Forensic Investigation
    • Forensic Insurance Investigation
    • Geotechnical Reporting And Site Evaluations
    • Mechanical & Electrical Site Layout
    • Potable Well And Water System Design
    • Residential Design
    • Road And Drainage Improvements
    • Site Planning & Construction Design
    • Special Inspection And Certification
    • Stormwater Abatement Design
    • Stormwater Pollution Prevention Plans And Inspection Services
    • Structural Design
    • Swimming Pool Design & Permitting
    • Wastewater Outfall Design
  • Selected Clients
  • About Us
  • Contact Us
Logo of jrl holzmacher engineering featuring a stylized blue atomic symbol next to the company name written in sleek, modern fonts.

Selected Capabilities

Project Gallery


Remediation support at a brownfields site with excavation work in progress, featuring wooden formworks and safety barriers.

Brownfields Site Investigation And Remediation Support

A worker in protective gear operating a drilling rig near a residential building as part of an Environmental Site Assessment phase I & II due diligence process.

Due Diligence Phase I & Phase II Environmental Site Assessments

Worker conducting site evaluations and operating a geotechnical drilling rig for soil sampling.

Geotechnical Reporting And Site Evaluations

Collapsed building with debris, structural damage, and under forensic insurance investigation.

Forensic Insurance Investigation

A workshop with car parts, tools hanging on the wall, and a car body in the background undergoing forensic investigation.

Expert Testimony And Forensic Investigation

Construction workers assembling a concrete formwork at a construction site under construction management.

Construction Observation And Documentation

Wooden framework for house construction undergoing special inspection on a cloudy day.

Special Inspection And Certification

Spray fountains operating in a pond with a silo and buildings in the background, incorporating elements of water system design.

Potable Well And Water System Design

Erosion control barriers designed for stormwater management set up near a water drainage area with multiple culverts.

Stormwater Pollution Prevention Plans And Inspection Services

Two green utility boxes mounted on a concrete base against a brown wooden wall, part of IA Systems.

Denitrification Treatment (IA) Systems

Jack-up barge near a pebble shoreline with a clear blue sky, designed for wastewater outfall.

Wastewater Outfall Design

A neatly organized panel of electrical controls, labeled wires, and cables.

Electrical Controls

Interior view of a building design under construction showing wooden framing and trusses.

Structural Design

Architectural engineering drawing of a residential house front elevation with a red door and stone facade.

Architectural Design

Workers install a precast concrete structure designed for stormwater management into a ground excavation.

Stormwater Abatement Design

Construction site with concrete foundations and cylindrical structures, likely for road and drainage infrastructure development, surrounded by dirt and sand.

Road And Drainage Improvements

Steel framework of a building under construction with architectural engineering ductwork and trees in the background.

Architectural Engineering Support

Modern two-story house with large windows and a combination of stone and metal cladding.

Residential Design

An outdoor swimming pool with lounge chairs in front of a multi-story residential building.

Swimming Pool Design & Permitting

Industrial water filtration system installed in a utility room with pipes and pumps visible.

Mechanical & Electrical Site Layout

Excavation site with marked underground utilities and retaining wall forms.

Site Planning & Construction Design

Logo of jrh consulting engineers + architects, dpc, featuring a stylized geometric symbol alongside the company name in light gray, elegant font.

Engineering and Architectural services for commercial, residential, and governmental projects in New York State.

Site Map

  • Services
  • Selected Capabilities
  • Selected Clients
  • About Us
  • History
  • Blog
  • Privacy Policy
  • Contact Us

Contact Info

Phone (631) 234 – 2220

Fax (631) 234 – 2221

Email [email protected]

Address 3555 Veterans Memorial
Hwy Suite A
Ronkonkoma, NY 11779-7636

© 2025 JRH Consulting Engineers + Architects, D.P.C. - All Right Reserved | Website By: WELL DRESSED WALRUS

  • Services
  • Selected Capabilities
    • Architectural Design
    • Architectural Engineering Support
    • Brownfields Site Investigation And Remediation Support
    • Construction Observation And Documentation
    • Denitrification Treatment (IA) Systems
    • Due Diligence Phase I & Phase II Environmental Site Assessments
    • Electrical Controls
    • Expert Testimony And Forensic Investigation
    • Forensic Insurance Investigation
    • Geotechnical Reporting And Site Evaluations
    • Mechanical & Electrical Site Layout
    • Potable Well And Water System Design
    • Residential Design
    • Road And Drainage Improvements
    • Site Planning & Construction Design
    • Special Inspection And Certification
    • Stormwater Abatement Design
    • Stormwater Pollution Prevention Plans And Inspection Services
    • Structural Design
    • Swimming Pool Design & Permitting
    • Wastewater Outfall Design
  • Selected Clients
  • About Us
  • Contact Us
Loading...