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ADD FOUR

UEI: PALNMQU3C9Y6

ADD FOUR is a federal contractor, registered under UEI PALNMQU3C9Y6. It has been awarded $38,552 in federal contracts. Primary work spans Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance. Top awarding agencies include Department Of The Interior.

Contact Information

Registration and classification details

Registration

UEI Code

PALNMQU3C9Y6

Federal Contracting Overview

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

AI Capability Profile

ADD FOUR provides specialized vehicle modification and equipment maintenance services. Their technical expertise includes the customization of heavy-duty chassis, specifically modifying F550 platforms with low-pressure tire configurations for specialized terrain and operational requirements. The co...

Key performance metrics

Award counts and award dollars by type, as prime and as subcontractor.

Awards Count

1

All time

Active

0

Currently performing

Completed

1

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

Awards by agency, industry, year, award type, size, and place of performance.

Awards by Agency

Department Of The Interior$38.6K100%

Awards by NAICS

811310 - Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance$38.6K100%

Awards by Agency Over Time

Awards by Place of Performance

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Open opportunities in ADD FOUR's top NAICS codes and agencies

Specialized Generator Overhaul and Major RepairThis subcontract for Specialized Generator Overhaul and Major Repair involves performing critical mechanical and electrical services on emergency generators for prime contractors working on Massachusetts Bay Transportation Authority projects. The scope of work includes complex electrical troubleshooting, major component replacement, and full engine rebuilds, utilizing precision machining tools and heavy lifting equipment to deliver fully functional systems with warranty certification. The project is governed by strict regulatory requirements, including compliance with Massachusetts General Laws chapter 30 section 39M and adherence to prevailing wage standards. Interested parties must note the response deadline of December 9, 2026, for this specialized technical engagement categorized under NAICS code 811310.

Massachusetts Bay Transportation Authority

POSTED

about 15 hours ago

DEADLINE

Light Tower Inspection and MaintenanceThis subcontract for the Massachusetts Bay Transportation Authority involves providing inspection and preventative maintenance services for light towers on various facility projects. The selected contractor will be responsible for evaluating mechanical and electrical systems and testing power sources and lighting elements utilizing specialized testing equipment and mobile service vehicles. The primary deliverables include the maintenance of operational light towers and the submission of comprehensive inspection reports. The contract requires strict adherence to prevailing wage standards and compliance with Massachusetts General Laws chapter 30 section 39M. Interested parties must submit their responses by the deadline of December 9, 2026. This opportunity falls under NAICS code 811310 and is designed to support prime contractors operating within MBTA facilities.

Massachusetts Bay Transportation Authority

POSTED

about 15 hours ago

DEADLINE

Diesel Generator Maintenance and Testing ServicesThis subcontract for Diesel Generator Maintenance and Testing Services involves providing preventative maintenance, service, inspection, and testing for permanent and portable diesel generators on MBTA emergency power projects. The scope of work covers units ranging from 150kW to over 500kW across several major brands, including Cummins, Caterpillar, Kohler, Onan, and Generac. Contractors are expected to utilize brand-specific diagnostic tools and load bank testing equipment to ensure all units are fully operational and delivered with comprehensive maintenance logs. The project requires strict adherence to Massachusetts General Laws chapter 30 section 39M. Interested parties must note that the response deadline is December 9, 2026. This effort falls under NAICS code 811310 and supports prime contractors in maintaining critical emergency power infrastructure for the Massachusetts Bay Transportation Authority.

Massachusetts Bay Transportation Authority

POSTED

about 15 hours ago

DEADLINE

RFP 149-26 Emergency Generator Maintenance

Solicitation # 149-26

The Massachusetts Bay Transportation Authority (MBTA) has issued RFP 149-26 for the inspection and testing of its emergency generators, support systems, and associated equipment to ensure they remain in a safe and reliable condition. The scope of work covers a diverse array of assets, including permanent diesel generators ranging from under 150 kW to over 500 kW, portable generators, and light towers across various Massachusetts locations such as the Redbridge Pump Station, Union Station, and Forest Hills. The contract is governed by Massachusetts General Laws c. 30 section 39M and includes strict requirements for prevailing wages, Build America Buy America compliance, and MBTA minimum insurance standards. Award will be granted to the lowest priced responsive and responsible bidder, with evaluation based on price, integrity, past performance, and compliance with public policy and EEO records. Bidders must provide a 5% bid bond, and the successful contractor will be required to provide a 100% performance bond and a 50% payment bond. Submissions must be made electronically via COMMBUYS by December 2, 2026, and must include a bid cover letter, bidder evaluation data, a technical response, and a detailed price response. Payment for completed work is processed within 35 days of written acceptance, with interest accruing on unpaid amounts at a fourteen-day rate.

Massachusetts Bay Transportation Authority

POSTED

about 15 hours ago

DEADLINE

Office Automation Maintenance and SupportThe Office Automation Maintenance and Support subcontract, issued by the Pennsylvania Office of Innovation and Technology, focuses on providing continuous technical support and maintenance for office automation fleets. The selected contractor will be responsible for executing preventative maintenance, performing necessary repairs, and conducting troubleshooting as specified in the Office Automation Form to ensure maximum equipment uptime for prime contractors on City of Philadelphia projects. Performance of these services will take place in Philadelphia, with a primary focus on delivering consistent service reports and operational reliability. Interested parties should note the response deadline of November 18, 2026, and the classification of the work under NAICS code 811310.

Office of Innovation & Technology (oit)

POSTED

about 16 hours ago

DEADLINE

Electric Motor Repair Services

Solicitation # 2026-RFP-052

The Las Virgenes Municipal Water District is soliciting proposals under solicitation 2026-RFP-052 for electric motor and motor control services, including rewinding, repair, and the purchase of new equipment for pumps, wells, boosters, and aerators. The District intends to award multiple contracts to ensure adequate coverage, with an estimated annual expenditure of approximately $200,000.00 on an as-needed basis. The initial contract term is one year, with the option for up to four additional one-year renewals. Proposals must be submitted via the Procurement Portal by November 30, 2026, and must remain firm for 90 days. Award selection is based on a points-weighted system where technical qualifications carry the most weight at 55%, followed by costs at 25% and mandatory elements at 20%. Required mandatory elements include proof of legal ability to operate in California and a confirmation of no conflicts of interest. Technical evaluation focuses on past performance, personnel quality, and the proposed approach to the scope of services. Vendors must adhere to strict performance timelines, including pick-up and delivery within 24 hours of a request, completion of repairs within five business days, and the submission of a detailed repair report with photographic documentation within 48 hours of completion. All work must comply with NEMA, IEEE, ANSI, and OSHA standards, utilizing OEM or equivalent quality parts. Vendors are required to implement a quality assurance program and maintain specific insurance minimums, including $1,000,000 per occurrence for general liability and $1,000,000 for business automobile liability. Additionally, the District requires the submission of a detailed pricing structure via a provided hourly rate sheet and documentation regarding Disadvantaged Business Enterprise certification where applicable.

Engineering & Facilities

POSTED

about 17 hours ago

DEADLINE

Preventive Maintenance (PM) ServicesThis subcontract for Preventive Maintenance (PM) Services, managed by DAS Procurement for the State of Connecticut, focuses on extending the operational life of equipment through scheduled maintenance for prime contractors. The scope of work includes performing visual inspections, verifying safety devices, cleaning components, lubricating moving parts, and conducting equipment calibration. To ensure quality and compliance, service providers must hold trade-specific licenses, such as the EPA 608 certification for refrigeration work, and are required to submit completed PM Service Reports for every piece of equipment serviced. The opportunity is categorized under NAICS code 811310 and was posted on November 12, 2026, with a response deadline of December 3, 2026. Interested parties can find further details and submission guidelines through the CTSource Bid Board portal.

DAS Procurement

POSTED

about 17 hours ago

DEADLINE

Cooking, Warewashing, and Food Preparation Equipment RepairThis subcontract agreement involves the inspection, diagnosis, and repair of commercial cooking and food preparation equipment for prime contractors working on State of Connecticut DAS projects. The scope of work covers a wide range of kitchen machinery, including ranges, ovens, convection and combi ovens, fryers, steamers, kettles, and warewashing equipment, while incorporating gas line maintenance and the use of commercial appliance components. The primary objective is to restore equipment to full operational status and provide detailed service reports. Managed by DAS Procurement for the state of Connecticut under NAICS code 811310, the contract was posted on November 12, 2026, with a response deadline of December 3, 2026. Interested parties can find further information through the CTSource Bid Board.

DAS Procurement

POSTED

about 17 hours ago

DEADLINE

Commercial Refrigeration and Foodservice Equipment Repair and PM Services

Solicitation # 26PSX0209

The State of Connecticut, through DAS Procurement, is soliciting bids for repair and preventive maintenance services for commercial refrigeration, cooking, warewashing, and food preparation equipment. The contract covers State Agencies and Department of Corrections (DOC) facilities throughout the state for a three-year term, with the possibility of extensions. Contractors may bid on one or both equipment categories and may optionally elect to provide services to DOC facilities. Service requirements include strict response times for Priority One refrigeration requests, requiring acknowledgment within 30 minutes and on-site arrival within 4 hours for general agency locations or 12 hours for DOC facilities. Preventive maintenance tasks involve visual inspections, safety device verification, cleaning, lubrication, and calibration, with all work performed according to manufacturer recommendations and industry best practices. Payments are processed via ACH or P-Card, with standard terms of 45 days, or 25 days for certified small or minority business enterprises. Contractors must comply with Connecticut General Statutes regarding standard wage rates, consumer data privacy, and non-discrimination laws, as well as the Americans with Disabilities Act. All delivered goods must be the latest standard new models unless otherwise specified, and contractors are required to minimize environmental impacts associated with packaging and disposal.

DAS Procurement

POSTED

about 17 hours ago

DEADLINE

WS597(108)8128 - 120(00)06(447) - Prestación de Servicio de mantenimiento preventivo y correctivo de las unidades de filtración de las plantas de tratamiento de agua potable Triple A SA ESP

Solicitation # Doc5984436824

Triple A S.A. E.S.P. is soliciting a contract for the preventive and corrective maintenance of filtration units at its potable water treatment plants located in Barranquilla, Sabanagrande, Ponedera, Puerto Colombia, Soledad (Cruz de Mayo), and the Acueducto Regional del Norte. The scope of work includes structural repairs such as the demolition and reconstruction of concrete joints between false bottoms, the cleaning and installation of air meshes using PVC piping, and the removal, classification, and application of filtering beds. The performance period is set for 12 months starting from the signing of the commencement act. Award eligibility is based on an economic qualification criterion, provided the bidder meets all technical, legal, and financial requirements. Bidders must submit their offers exclusively via the SAP Ariba Sourcing platform using the mandatory Price and Quantities Excel annex without modifying formulas. The contract requires several insurance guarantees, including a general compliance bond for 20% of the total contract value and a civil liability policy for 300,000,000 COP covering premises, labors, and operations. Contractors must strictly adhere to Occupational Health and Safety (SST) standards and the company's safety manual, as non-compliance may lead to immediate suspension of activities. Invoicing must be handled electronically according to DIAN Resolution 42, and payments are contingent upon providing proof of social security affiliations for personnel and payment of required district stamps. Additionally, all bidders must submit an Ethics and Compliance Declaration to disclose potential conflicts of interest or family relations within the organization.

Triple A S.A. E.S.P.

POSTED

about 18 hours ago

DEADLINE

Commercial Kitchen Equipment MaintenanceThis subcontract for Commercial Kitchen Equipment Maintenance involves providing preventative maintenance and emergency repairs for commercial kitchen appliances at the Connaught School for Girls. The scope of work includes the inspection and repair of ventilation systems, dishwashers, refrigerators, and ovens utilizing specialized diagnostic tools. The successful contractor is responsible for ensuring all equipment remains operational and providing detailed maintenance logs as part of the deliverables. To qualify for this engagement, contractors must hold valid electrical safety certifications and Gas Safe registration. The project falls under NAICS code 811310 and is managed through prime contractors overseeing projects for the school. This agreement ensures that critical kitchen infrastructure is maintained to safety and operational standards.

Connaught School for Girls (RM&C)

POSTED

about 20 hours ago

DEADLINE

Generator Preventative Maintenance and RepairThis subcontract for Generator Preventative Maintenance and Repair involves providing mechanical and electrical maintenance and repair services for prime contractors working on Spartanburg County School District Five facility projects. The scope of work includes performing annual and quarterly services such as replacing oil, filters, coolant, and spark plugs, as well as conducting system leak inspections, lubricating moving parts, and verifying AC output frequency to 60 Hz. Additionally, the contractor is responsible for ATS load testing to ensure operational generators and providing written condition evaluations. To qualify for this engagement, contractors must possess a professional business license and maintain compliance with the South Carolina Drug-Free Workplace standards. The solicitation was posted on November 12, 2026, with a response deadline of December 4, 2026. This opportunity falls under NAICS code 811310 and is managed by Spartanburg District Five in South Carolina.

Spartanburg District Five

POSTED

about 21 hours ago

DEADLINE

Generator Maintenance

Solicitation # 2027-005

Solicitation 2027-005, issued by the Spartanburg District Five in South Carolina, seeks a contractor to provide preventative maintenance and repair services for generators across 14 school facilities, a central administrative office, a maintenance complex, and various support buildings. The scope of work includes annual mechanical and electrical evaluations, quarterly inspections of fluid levels and battery connections, and load testing of automatic transfer switches to ensure a 60 Hz frequency. Key deliverables include detailed written evaluations of generator conditions, oil analysis reports, and not-to-exceed estimates for all non-emergency projects. All parts and fluids used must meet or exceed manufacturer specifications. The contract will be awarded to the lowest responsive and responsible bidder. To be considered, bidders must submit one original paper copy of their bid in a sealed package by December 4, 2026, at 10:00 AM, including a W9, a professional business license, and specific completed pages from the solicitation. Offerors must certify compliance with the South Carolina Drug-Free Workplace Act and ethics requirements. Additionally, a Resident Contractor Preference may be applied to bidders who maintain a South Carolina office and meet specific staffing and labor cost thresholds. The selected vendor is required to maintain worker's compensation and general liability insurance throughout the performance period.

Spartanburg District Five

POSTED

about 21 hours ago

DEADLINE

Послуги з проведення поточного ремонту в об'eмi ПР-3 дизель-поїздів cepii ДПКр-3 №ОО5 та №006 iз капітальним ремонтом силовим установкам Voith Rail Раск в об'ємi КР-1 при нanpaцюванні 16000 мотогодин

Solicitation # UA-2026-11-12-009621-a

This contract, issued by the Suburban Passenger Company branch of JSC Ukrainian Railways, concerns the provision of current maintenance services for two DPKr-3 series diesel trains, specifically units 005 and 006. The scope of work includes PR-3 level current repairs combined with a KR-1 level capital overhaul of the Voith Rail Rasck power plants, which is required upon reaching 16,000 engine hours. The solicitation, identified by number UA-2026-11-12-009621-a, was posted on November 12, 2026. The project is managed by the Government of Ukraine with the primary point of contact being Maksym Yuriyovych Glavin. Performance of the services will take place within Ukraine as specified in the official documentation.

Філія "Приміська пасажирська компанія" акціонерного товариства "Українська залізниця"

POSTED

DEADLINE

MIL-STD-1330 Precision Cleaning ServicesThis subcontract for MIL-STD-1330 Precision Cleaning Services involves providing specialized oxygen-clean cleaning and testing for prime contractors supporting US Navy NAVSUP WSS projects. The scope of work requires the removal of hydrocarbons and other contaminants from valve components using approved solvents within clean-room facilities to ensure full compatibility with oxygen, helium, nitrogen, and hydrogen systems. The selected provider must certify all processes in accordance with MIL-STD-1330 and deliver both the certified oxygen-clean components and detailed cleaning certification reports. This Department of Defense requirement, managed through DLA Mechanicsburg under NAICS code 811310, has a response deadline of December 1, 2026.

SPRMM1 DLA Mechanicsburg

POSTED

DEADLINE

Refuse Container Repair, Painting, and CleaningThis subcontract opportunity, managed by the Department of Defense for W6QM Micc-Fort Buchanan, involves the cleaning, painting, and structural repair of waste containers at Fort Buchanan. The scope of work includes servicing reuse and food waste dumpsters by removing rust, painting surfaces for uniformity, and repairing leaks, doors, lids, and latches to ensure all delivered containers are leak-proof. Contractors are required to utilize industrial pressure washers and welding equipment to complete these tasks for prime contractors. The project is designated as a Total Small Business Set Aside under NAICS code 811310. Interested parties must submit their responses by November 27, 2026, at 2:00 PM. Performance of the contract will take place within Fort Buchanan, zip code 00934.

W6QM Micc-Fort Buchanan (rc)

POSTED

DEADLINE

Elevator Repair and Maintenance Support Services

Solicitation # W91RUS-27-R-A002

Solicitation W91RUS-27-R-A002 is a total small business set-aside for elevator repair and maintenance support services at Fort Huachuca, Arizona. The scope of work includes the inspection, maintenance, and repair of various systems, including hydraulic passenger and freight elevators, electric handicap chairs, and vertical platform lifts. Key deliverables involve bi-annual, annual, and five-year inspection certifications for up to 68 elevators, as well as general preventive maintenance and emergency repairs. All work must adhere to ANSI/ASME A.17.1 standards and be certified by an accredited ASME QEI Inspector. The contract is structured as a firm-fixed-price agreement with a base period from March 1, 2027, through February 29, 2028, followed by four option periods and a final extension through August 31, 2032. Award will be determined using a best value trade-off approach, where the technical and management approach is weighted more heavily than price. Proposals must be submitted in three volumes by January 8, 2027. Administrative requirements include the use of the Wide Area Workflow system for payments and strict adherence to Department of Defense security and marking standards for any delivered items.

W6QK Acc-Apg Contr Ctr

POSTED

DEADLINE

in about 2 months

Annual Inspection Maintenance of Manlifts

Solicitation # 70ZH1526QCGA00002

The U.S. Coast Guard Academy in New London, Connecticut, is soliciting quotes for preventive maintenance, annual inspections, and corrective maintenance services for Government-owned mobile elevating work platforms, specifically scissor and boom lifts. This 100% Small Business Set-Aside contract consists of a base year starting January 1, 2027, and four subsequent option years. The scope of work requires the contractor to provide qualified personnel, tools, and supervision to maintain equipment in accordance with U.S. Coast Guard Maintenance Procedure Cards, OSHA requirements, ANSI/SAIA A92 standards, and original equipment manufacturer specifications. The contract utilizes a hybrid pricing structure where annual preventive inspections for scissor and boom lifts are firm-fixed-price, while corrective maintenance, troubleshooting, and repairs are ordered on a time-and-materials basis through approved task orders. Award will be determined using the Lowest Price Technically Acceptable approach, evaluating offers based on technical acceptability and the lowest evaluated price. Key deliverables include completed inspection forms, monthly status reports, and technical authorization requests for identified discrepancies. Quotes are due by November 16, 2026, and must be submitted electronically to the designated contracting officer.

POSTED

DEADLINE