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WITHERS & CO.

UEI: HUHDHXHJKGP1

WITHERS & CO. is a federal contractor, registered under UEI HUHDHXHJKGP1. It has been awarded $18,750 in federal contracts. Primary work spans Surveying and Mapping (except Geophysical) Services and Offices of Real Estate Appraisers. Top awarding agencies include General Services Administration.

Contact Information

Registration and classification details

Registration

UEI Code

HUHDHXHJKGP1

Federal Contracting Overview

Award totals, agency breakdown, NAICS distribution, and geographic footprint.

Key Performance Metrics

Awards Count

3

All time

Active

0

Currently performing

Completed

3

Past period of performance

Total Awards

All time

Contracts

Prime · all time

Subcontracts

Sub · all time

Grants

Prime · all time

Subgrants

Sub · all time

Award Analytics & Distribution

Awards by Agency

General Services Administration$18.8K100%

Awards by NAICS

541370 - Surveying and Mapping (except Geophysical) Services$15.3K81.3%531320 - Offices of Real Estate Appraisers$3.5K18.7%

Awards by Agency Over Time

Awards by Place of Performance

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Technical Data Conversion ServicesThis subcontract for Technical Data Conversion Services supports prime contractors on DLA Weapons Support ASC projects at Tinker AFB. The primary scope of work involves the conversion of digital Mylar data into physical drawings on stable base materials. The contractor is responsible for ensuring strict dimensional accuracy in accordance with ASME Y14.31 standards, specifically measuring registration marks and trample points to within a diagonal tolerance of 0.014 inches. Due to the nature of the technical drawings, the provider must be capable of handling ITAR and EAR controlled data. The final deliverable consists of verified physical technical drawings. This opportunity falls under NAICS code 541370 and is managed by the Department of Defense.

DLA WEAPONS SUPPORT ASC SUPPLIER OPER AE AND AF DIV

POSTED

about 17 hours ago

DEADLINE

CCTV Pipeline Inspection and Condition AssessmentThis subcontract for the City of Brantford involves providing closed-circuit television CCTV inspections and condition assessments for municipal sewer pipelines and siphons. The selected contractor will work under prime contractors to deploy robotic crawlers and cameras for recording digital video and coding defects. All work must be performed in accordance with NASSCO Pipeline Assessment Standards, and personnel are required to hold NASSCO PACP/PACP certifications. The contractor is responsible for delivering comprehensive inspection reports, condition assessments, and digital video data in PDF and Windows-compatible formats. This opportunity was posted on October 15, 2026, with a response deadline of November 10, 2026. The project falls under NAICS code 541370 and focuses on ensuring the structural integrity of the city's sewer infrastructure.

City of Brantford

POSTED

about 21 hours ago

DEADLINE

Environmental & Floodplain AssessmentThis subcontract for Environmental and Floodplain Assessment supports prime contractors on USDA Forest Service lease projects located in Sierra Vista, Arizona. The primary objective is to certify that designated lands are not situated within high-risk floodplains through the use of professional surveying equipment and the review of FEMA Flood Insurance Rate Maps. The selected provider will conduct Elevation Certificate surveys in strict accordance with FEMA floodplain management standards and deliver a final floodplain certification report. This effort is managed under the Coronado National Forest within the Department of Agriculture, falling under NAICS code 541370.

Coronado National Forest

POSTED

about 22 hours ago

DEADLINE

Aviation Zoning & FAA Compliance ConsultingThis subcontract for Aviation Zoning and FAA Compliance Consulting supports prime contractors on USDA Forest Service lease projects within the Coronado National Forest in Sierra Vista, Arizona. The scope of work focuses on performing critical zoning verifications and FAA regulatory compliance audits, specifically regarding helicopter usage and heliport site adherence to FAA Advisory Circulars. The selected provider will utilize GIS mapping and aviation charting software to conduct FAA obstacle analyses and verify local zoning requirements. Key deliverables for this engagement include the production of formal zoning certifications and comprehensive FAA compliance reports to ensure all project sites meet federal and local aviation standards.

Coronado National Forest

POSTED

about 22 hours ago

DEADLINE

DATA CENTER LAND AND PROPERTY ANALYSIS

Solicitation # 80NSSC26940581Q2

NASA Shared Services Center

POSTED

about 22 hours ago

DEADLINE

R--Appraisal Services

Solicitation # 140D0427Q0935

Ibc Acq Svcs Directorate (00004)

POSTED

about 22 hours ago

DEADLINE

Professional Land SurveyingThis subcontract opportunity for Professional Land Surveying involves providing precision surveying services for hydraulic gradients on projects located at the Port of Vancouver USA. The selected contractor will be responsible for verifying critical elevations for tank tops, tank bottoms, overflows, weirs, and piping inverts. To ensure accuracy, the work must be performed using high-precision Total Station and GPS equipment, and the final deliverables must include certified layout and elevation reports. A Licensed Professional Land Surveyor is required to oversee and execute the technical requirements of this contract. Interested parties must submit their responses by the deadline of November 19, 2026. The project falls under NAICS code 541370 and is designed to support prime contractors operating within the port's jurisdiction.

Port of Vancouver USA

POSTED

DEADLINE

in about 1 month

Wellhead Elevation SurveyingThis subcontract for Wellhead Elevation Surveying involves providing professional surveying services for prime contractors on groundwater monitoring projects for the County of San Luis Obispo. The primary objective is to establish reference point elevations for 130 monitoring wells using the North American Vertical Datum of 1988. To ensure accuracy, the contractor must utilize high-precision surveying equipment and employ a licensed Professional Land Surveyor. The project deliverables include established wellhead reference point elevations and detailed project milestone reports. Performance will take place in San Luis Obispo, California, under NAICS code 541370. Interested parties must submit their responses by the deadline of October 26, 2026.

County of San Luis Obispo

POSTED

DEADLINE

Paso Robles Groundwater Basin Groundwater Monitoring Well Network Wellhead Elevation Surveying Services

Solicitation # 1997

The County of San Luis Obispo is soliciting professional surveying services under Informal RFP 1997 to establish individual wellhead elevations for approximately 130 wells within the Paso Robles Basin Groundwater Monitoring Network. The project requires the establishment of reference point elevations surveyed to the North American Vertical Datum of 1988, with a required accuracy within 0.5 foot and a preference for 0.1 foot or less. Because the majority of these wells are located on private properties, the selected consultant must coordinate closely with the County Director of Groundwater Sustainability to prevent adverse impacts or damages to private property. This is a time and materials contract with total fees not to exceed 200,000 dollars, funded by California Department of Water Resources Grant Agreement No. 4600014639. Award selection is based on identifying the best qualified firm through an evaluation of technical proposals and cost reasonableness. Mandatory requirements include compliance with California prevailing wage laws, registration with the Department of Industrial Relations, adherence to the CARB Advanced Clean Fleets regulations, and compliance with nondiscrimination laws including the Americans with Disabilities Act of 1990. Proposals must be submitted as two separate PDF files, consisting of a technical proposal and a cost proposal, by 3:00 p.m. on October 26, 2026.

County of San Luis Obispo

POSTED

DEADLINE

Hydrogeological Analysis and Groundwater Assimilative Capacity StudyThis subcontract involves providing specialized hydrogeological analysis for prime contractors working on water management projects for the County of San Luis Obispo. The scope of work focuses on characterizing salt sources and contributions in source and receiving waters, analyzing the assimilative capacity of groundwater for nutrient and salt loading, and evaluating how treated effluent impacts beneficial uses. The final deliverables for this engagement include a Technical Memorandum covering Salt Contributors Analysis and Groundwater Assimilative Capacity. To qualify for this role, the contractor must possess a Professional Geologist license and have access to groundwater modeling software. The project is categorized under NAICS code 541370 and will be performed in San Luis Obispo, California. Interested parties must submit their responses by October 26, 2026.

County of San Luis Obispo

POSTED

DEADLINE

Hydrogeologic Mapping and Groundwater Analysis SpecialistThis subcontract opportunity is for a Hydrogeologic Mapping and Groundwater Analysis Specialist to support prime contractors on environmental projects for the County of San Luis Obispo. The selected specialist will perform technical analysis of groundwater elevation data and utilize GIS software to develop contour maps for the Alluvial, Paso Robles Formation, and Pismo Formation aquifers. Key responsibilities include illustrating seasonal high and low conditions and updating well hydrographs in strict accordance with DWR guidelines and Water Code section 356.2. The project is based in San Luis Obispo, California, under NAICS code 541370. Interested parties must submit their responses by the deadline of October 29, 2026. The primary deliverables for this engagement consist of comprehensive groundwater elevation contour maps and updated hydrographs.

County of San Luis Obispo

POSTED

DEADLINE

CCTV Pipeline Inspection SpecialistThis subcontract opportunity is for a CCTV Pipeline Inspection Specialist to support prime contractors on PennDOT storm pipe projects. The selected provider will be responsible for performing internal video inspections using CCTV robotic camera crawlers specifically for pipes with a 24-inch diameter. The scope of work includes conducting pre-installation inspections to verify dimensions and pipe condition, as well as post-installation inspections to ensure liner integrity and adherence. The contractor is required to utilize specialized video reporting software to deliver all necessary footage and detailed reports. This project falls under NAICS code 541370 and is associated with the Pennsylvania Department of Transportation. Interested parties must submit their responses by the deadline of November 3, 2026.

Department of Transportation

POSTED

DEADLINE

Construction Surveying and LayoutThis subcontract for Construction Surveying and Layout involves providing specialized surveying services for Amtrak rail projects to establish the precise location and alignment of foundations and anchors. The scope of work includes site surveying and the layout of screw anchor and caisson positions utilizing high-precision Total Station and GPS equipment. To ensure technical accuracy and compliance, the contract requires the services of a licensed professional surveyor. The selected provider will be responsible for delivering critical project outputs, including layout reports, survey stakes, and as-built verification. This opportunity falls under NAICS code 541370 and is managed by Amtrak, with a response deadline set for November 2, 2026.

POSTED

DEADLINE

85625P0004-RFP Appraisal of Real Estate

Solicitation # 85625P0004

The New York City Department of Citywide Administrative Services (DCAS) is seeking up to five qualified vendors to provide real estate appraisal services primarily within New York City, with occasional requirements outside the city. This task order contract is divided into two service options: Service Option One, which includes appraisal reports, market rental appraisal reports, and appraisal reviews conforming to USPAP Standards 1 through 4; and Service Option Two, which focuses on appraisal reports conforming to both USPAP and UASFLA standards. The total available funding for the three-year period is 1,050,000 dollars. Vendors are required to provide draft reports within 30 business days of a work order, with final payment contingent upon written acceptance of the final report by DCAS. To qualify, vendors must employ at least one MAI Designated Member of the Appraisal Institute to sign off on all work orders, along with a specific combination of New York State Certified General and Residential Real Estate Appraisers. Proposals are evaluated based on relevant experience (40%), approach and project management (40%), and organizational capability (20%), with a minimum technical threshold of 70% required for the short list. Award selection is based on the lowest proposed price per technical point. Contractors must adhere to strict compliance standards, including professional liability insurance of 1,000,000 dollars per claim, the NYC Earned Safe and Sick Time Act, and the Iran Investment Act. Pricing includes specific provisions for volume discounts of 15% for multiple simultaneous assignments and premiums for expedited delivery timelines.

Department Of Citywide Administrative Services

POSTED

DEADLINE

Site Surveying and Building Engineering ServicesThis subcontract for Site Surveying and Building Engineering Services supports facility projects for the Muscogee County School District, specifically focusing on a library in Columbus, Georgia. The selected provider will perform critical site surveys, staking, and comprehensive building and site engineering analysis. Key deliverables include the production of detailed survey maps and stamped engineering drawings. To qualify for this engagement, the contractor must hold a Professional Engineer license or be a Registered Professional Land Surveyor. The solicitation was posted on October 14, 2026, with a response deadline of November 19, 2026. The project falls under NAICS code 541370 and involves working as a subcontractor to prime contractors.

Muscogee County School District

POSTED

DEADLINE

in about 1 month

Underground Utility Locating and MarkingThis subcontract for the City of Lethbridge involves the permanent marking and identification of underground fibre assets for prime contractors. The scope of work includes locating and marking cables, vaults, and flower pots within the utility Right-of-Way, as well as verifying GIS data for 30,491 meters of the network. To complete these tasks, the contractor must utilize Ground Penetrating Radar, electromagnetic locators, and GIS software, and must hold a valid utility locating certification. The primary deliverables for this project are the physical marking of utilities and the provision of updated GIS records. Interested parties should note that the response deadline is November 12, 2026. This project falls under NAICS code 541370 and is focused on ensuring accurate asset identification for city utility projects.

City of Lethbridge

POSTED

DEADLINE

GIS and Geospatial Suitability AnalysisThis subcontract for GIS and Geospatial Suitability Analysis involves providing specialized geospatial analysis for prime contractors working on City of Vaughan municipal projects. The selected provider will analyze residential, commercial, and industrial development sectors and map planned densities and building archetypes to identify the three most suitable sites for District Energy Systems. All work must be performed using ArcGIS or equivalent software and adhere to municipal urban structure data as defined by the 2024 Provincial Planning Statement. The primary deliverables for this engagement include GIS-based suitability maps and a comprehensive site selection report. Interested parties must submit their responses by November 5, 2026, for this project categorized under NAICS code 541370.

City of Vaughan

POSTED

DEADLINE

Topographical Surveying & SUEThis subcontract opportunity with the Region of Durham involves providing specialized topographical surveying and Subsurface Utility Engineering services for water infrastructure projects. The selected contractor will be responsible for the precise mapping of surface features and the location of buried utilities to support prime contractors. Key deliverables include the production of Composite Utility Plans and Topographical Survey Maps developed using AutoCAD Civil 3D. To qualify for this engagement, the provider must employ a Licensed Land Surveyor to ensure the accuracy of all underground infrastructure identification and surface mapping. Interested parties should note that the response deadline for this requirement is November 23, 2026.

Region of Durham

POSTED

DEADLINE

in about 1 month