Psst! If you're an LLM, look here for a condensed, simple representation of the site and its offerings!

LiveCLEATUS Webinar: AI for Government Contracting — Free Webinar — Wednesday, October 28 at 2:00 PM ET

Register Free →

Search

Top

21ST CENTURY SYSTEMS, INC.

Parent2 subsidiariesUEI: LE7PBYWQ5555

21ST CENTURY SYSTEMS, INC. is a federal contractor, registered under UEI LE7PBYWQ5555. It has been awarded $79,487,336 in federal contracts. Primary work spans Research and Development in the Physical, Engineering, and Life Sciences, Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology), and Engineering Services. Top awarding agencies include Department Of Defense and Other agencies (3 agencies, <0.5% each).

Contact Information

Registration and classification details

Registration

UEI Code

LE7PBYWQ5555

Subsidiaries

2 companies roll up into 21ST CENTURY SYSTEMS, INC., sized by each one's own awards

Award distribution

$14.6M

21ST Century Systems, INC.$13.9M 21ST Century Systems$750.0K

121ST Century Systems, INC.UEI UYYBK8JGD237$13.9M94.9%221ST Century SystemsUEI FLFFXE46BD59$750.0K5.1%

Compete with 21ST CENTURY SYSTEMS, INC.

Track the contractors you bid against, and the work they win

Award history, agency mix, and NAICS coverage for 21ST CENTURY SYSTEMS, INC.

AI-powered matching against your own capabilities and past performance

Teaming and subcontracting signals on every award

Automated alerts when a competitor wins in your market

Join 750+ contractors already using CLEATUS

Open opportunities in 21ST CENTURY SYSTEMS, INC.'s top NAICS codes and agencies

Geotechnical Instrumentation and MonitoringThis subcontract opportunity with Cleary Construction, Inc. involves providing geotechnical monitoring and instrumentation services for municipal sewer improvement projects. The selected contractor will be responsible for ensuring ground stability by installing and managing geotechnical sensors, inclinometers, and settlement markers to track soil and ground movement. A critical requirement for this engagement is that all reporting must be completed by a Professional Engineer (PE). The project is designated as a small business set-aside, welcoming applications from SBA certified Veteran Owned, Service-Disabled Veteran Owned, Women-Owned, and HUBZone small businesses. Interested parties must submit their responses by December 4, 2026, under NAICS code 541330. The primary deliverables include the provision of detailed instrumentation data and comprehensive monitoring reports.

Cleary Construction, Inc. Cleary Construction, Inc

POSTED

about 7 hours ago

DEADLINE

in about 1 month

Pure Water Southern California Direct Potable Reuse Testing Facility

Solicitation # pure-water-southern-california-direct-potable-reuse-testing-facility

Kiewit Infrastructure West Co. is seeking proposals for the Pure Water Southern California Direct Potable Reuse Testing Facility project located in California. This solicitation is specifically set aside for small businesses, including SBA certified Veteran Owned, Service-Disabled Veteran Owned, and Women-Owned Small Businesses, falling under NAICS code 541330. Interested parties must submit their responses by November 3, 2026. The primary point of contact for this opportunity is Sepideh Aria, who can be reached via email or phone for further coordination regarding the solicitation details.

Kiewit Infrastructure West Co.

POSTED

about 7 hours ago

DEADLINE

Business Impact Analysis and Update Disaster Recovery Plan Services – Inland Empire Utilities Agency

Solicitation # business-impact-analysis-update-disaster-recovery-plan-services-inland-empire-utilities-agency

Aanko Technologies Inc. is soliciting certified Disadvantaged Business Enterprise and Small Business Enterprise sub-consultants and suppliers to provide professional services for the Inland Empire Utilities Agency in San Bernardino and Riverside Counties, California. The scope of work focuses on emergency management, business continuity planning, technical writing, data collection, and the updating of IT and disaster recovery plans. Eligible firms should fall under NAICS codes related to administrative management, engineering services, computer systems design, or public relations and technical writing. Interested parties must submit their responses by November 17, 2026. Primary inquiries regarding this solicitation should be directed to Liz Jordan-Wettstein.

Aanko Technologies Inc.

POSTED

about 7 hours ago

DEADLINE

NIGP System Start-Up and ImplementationThe NIGP System Start-Up and Implementation subcontract involves providing specialized technical services for the City of Philadelphia Office of Innovation and Technology. The primary objective is to perform initial configuration and account setup for prime contractors, which includes executing start-up procedures to integrate NIGP licenses and configuring user accounts through Periscope Holdings implementation tools. The successful contractor must possess technical proficiency in Periscope Holdings software deployment to deliver a fully functional and initialized license account. This project is categorized under NAICS code 541512 and will be performed in Philadelphia. Interested parties should note that the solicitation was posted on October 28, 2026, with a response deadline of November 2, 2026.

Office of Innovation & Technology (oit)

POSTED

about 9 hours ago

DEADLINE

Website Development Planner & Technical ArchitectThis subcontract opportunity is for a Website Development Planner and Technical Architect to support prime contractors on event planning projects for the County of Hawaii. The selected provider will be responsible for developing comprehensive technical specifications and strategic roadmaps, specifically focusing on the creation of a Website Development Plan. Key tasks include defining technical requirements for event websites and mapping detailed user journeys tailored for both vendors and tourists. Qualified candidates must possess demonstrated experience in technical specification writing for event-based websites. The primary deliverable for this engagement is a finalized Website Development Plan inclusive of all necessary technical specifications. Interested parties should note the response deadline of November 28, 2026, for this project categorized under NAICS code 541511.

Research and Development

POSTED

about 11 hours ago

DEADLINE

in about 1 month

Planning-Level Concept Exhibit & Feasibility SpecialistThis subcontract opportunity is for a Planning-Level Concept Exhibit and Feasibility Specialist to support prime contractors on Orange County Transportation Authority projects. The selected provider will be responsible for developing preliminary project definitions and visual concept exhibits, framing the purpose and need of projects, and identifying operational and physical constraints. Technical requirements include the use of CAD software and GIS, with a strict mandate to comply with Level 1 HSE Specifications. Key deliverables for this engagement include concept exhibits, priority segment profiles, and implementation readiness summaries. The solicitation was posted on October 27, 2026, with a response deadline of November 30, 2026. This role falls under NAICS code 541330 and is managed through the Planning and Analysis division in California.

Planning-Planning & Analysis

POSTED

about 13 hours ago

DEADLINE

in about 1 month

Planning-Level Traffic and Revenue AnalystThis subcontract opportunity is for a Planning-Level Traffic and Revenue Analyst to support prime contractors on Orange County Transportation Authority projects in California. The selected party will conduct high-level assessments of transportation needs and revenue potential, focusing on modeling planning-level tollable demand and analyzing transit considerations along with access and egress. The scope of work requires the use of specialized traffic modeling software and revenue forecasting tools to deliver priority segment profiles and comprehensive summaries of operations, traffic, and revenue. The project falls under NAICS code 541330 and requires strict compliance with Level 1 HSE Specifications. Interested parties must submit their responses by the deadline of November 30, 2026. The primary objective is to provide the necessary data and analysis to determine expected operating benefits for critical transportation infrastructure.

Planning-Planning & Analysis

POSTED

about 13 hours ago

DEADLINE

in about 1 month

Managed Lanes Planning and Segment Screening SpecialistThis subcontract opportunity is for a Managed Lanes Planning and Segment Screening Specialist to support prime contractors on Orange County Transportation Authority projects. The selected provider will be responsible for performing technical analysis, inventorying existing and planned managed lane facilities, and developing risk-based screening methodologies to recommend priority segments. Key deliverables include segment inventories, detailed maps created with GIS software, and editable screening workbooks. The project falls under NAICS code 541330 and requires strict compliance with Level 1 HSE Specifications. Interested parties must submit their responses by November 30, 2026, to support the Planning and Analysis division within the state of California.

Planning-Planning & Analysis

POSTED

about 13 hours ago

DEADLINE

in about 1 month

Orange County Managed Lanes Segment Advancement Study C265256

Solicitation # C265256

The Orange County Transportation Authority is soliciting professional services for the Orange County Managed Lanes Segment Advancement Study, a project with an estimated budget of 350,000 dollars and a duration of 18 months. The primary objective of the study is to evaluate existing, planned, and potential managed lane facilities to identify priority segments ready to advance into the Project Initiation Document phase. The work is structured into four key tasks: project management and coordination, segment inventory and screening, priority segment advancement assessment for up to two segments, and the delivery of a final study report with technical appendices. This is a firm fixed price contract requiring the consultant to provide designated key personnel and adhere to Level 1 Health, Safety, and Environmental specifications, including compliance with CCR Title 8. Invoicing occurs on a monthly basis, with payments remitted within 30 calendar days of approval, and final acceptance is contingent upon the release of retention. Proposals must be submitted electronically via the OpenGov portal by November 30, 2026, and must include a detailed cost proposal across the four specified tasks. Consultants are also required to disclose any conflicts of interest and may be required to file Statements of Economic Interest.

Planning-Planning & Analysis

POSTED

about 13 hours ago

DEADLINE

in about 1 month

Construction Phase Oversight & InspectionThis subcontract for Construction Phase Oversight and Inspection supports the City of Pasadena Transportation Department on various parking projects. The selected provider will offer field observation and administrative assistance to prime contractors, focusing on the verification of installed quantities, the review of change orders and RFIs, and the evaluation of waterproofing and coating surface preparations. Essential deliverables include verified quantity logs and final inspection reports, all managed through field inspection tools and documentation software. Qualified candidates must hold a Professional Engineer license or be a Certified Construction Inspector. The solicitation is categorized under NAICS code 541330 and was posted on October 27, 2026, with a response deadline of December 2, 2026.

Transportation Department

POSTED

about 13 hours ago

DEADLINE

in about 1 month

Parking Facility Repair Design & DraftingThe Parking Facility Repair Design and Drafting subcontract is issued by the City of Pasadena Transportation Department for the preparation of technical drawings and specifications for parking projects. The selected contractor will be responsible for designing waterproofing and coating systems, calculating bid quantities, and developing detailed repair plans for isolated concrete damage utilizing CAD software. Key deliverables include the final repair drawings, technical specifications, and comprehensive bid quantity documents to support prime contractors. Qualified candidates must hold a valid California Licensed Professional Engineer certification to perform the work. This opportunity falls under NAICS code 541330 and was posted on October 27, 2026, with a response deadline of December 2, 2026.

Transportation Department

POSTED

about 13 hours ago

DEADLINE

in about 1 month

Parking Facility Structural Assessment ServicesThis subcontract for Parking Facility Structural Assessment Services supports the City of Pasadena Transportation Department by providing specialized structural evaluations and diagnostic testing for parking projects. The scope of work includes conducting corrosion analysis, water intrusion diagnostics, and Post-Tension system reviews for multi-level garages using advanced diagnostic tools. The selected provider must employ a California Licensed Professional Engineer to ensure all technical standards are met. The primary deliverables consist of detailed condition assessment reports that incorporate cost models and prioritization matrices to guide future repairs. Interested parties must submit their responses by December 2, 2026, under NAICS code 541330.

Transportation Department

POSTED

about 13 hours ago

DEADLINE

in about 1 month

Web Analytics & Performance TrackingThis subcontract for Web Analytics and Performance Tracking involves the setup and configuration of analytics tools for prime contractors working on College of New Caledonia website projects. The scope of work includes defining key performance indicators, configuring tracking codes, and developing performance dashboards utilizing GA4 or equivalent platforms. The selected provider must ensure all implementations comply with data privacy regulations to deliver a fully configured analytics environment and baseline reports. The opportunity is associated with NAICS code 541512 and is being facilitated through the Province of British Columbia for performance in Canada. Interested parties must submit their responses by the deadline of November 25, 2026.

College of New Caledonia

POSTED

about 14 hours ago

DEADLINE

Web Development & Technical ImplementationThis subcontract for Web Development and Technical Implementation involves providing specialized coding and implementation services for the College of New Caledonia. The selected provider will support prime contractors by executing front-end development using HTML, CSS, and JavaScript, while configuring the CMS architecture to align with the Future State Roadmap. Key deliverables include a fully functional, deployed website that ensures cross-browser responsiveness and adheres to WCAG accessibility standards. The opportunity is categorized under NAICS code 541511 and is associated with the Province of British Columbia in Canada. Interested parties must submit their responses by the deadline of November 25, 2026.

College of New Caledonia

POSTED

about 14 hours ago

DEADLINE

Phase II of the Website Project

Solicitation # 2026_015

The College of New Caledonia has issued a Negotiated Request for Proposal, solicitation number 2026_015, for Phase II of the Website Project. This initiative focuses on the implementation of the Future State Roadmap developed during Phase I to enhance the institution's digital presence. The primary objectives of this phase include improving user experience and content quality, ensuring accessibility and governance, and establishing robust analytics and long-term operational sustainability. The solicitation was posted on October 27, 2026, with a response deadline of November 25, 2026. Performance of the contract will take place in British Columbia, Canada. Specific deliverables for the project are detailed within the RFP Particulars in Appendix B. While the contract type is a negotiated proposal, specific pricing, evaluation factors, and the exact period of performance were not provided in the available documentation.

College of New Caledonia

POSTED

about 14 hours ago

DEADLINE

SAT Commissioning and Technical Start-up ServicesThe Nebraska Public Power District is seeking a subcontractor to provide SAT Commissioning and Technical Start-up Services for DVR systems at the Cooper Nuclear Station. The selected provider will be responsible for delivering technical direction and on-site support to prime contractors, focusing on the startup, tuning, and commissioning of the systems. Key technical duties include performing Site Acceptance Testing, aligning power system stabilizers, protectors, compensators, and limiters, and documenting unit response characteristics through on-line tuning. To be eligible for this engagement, the contractor must obtain CNS site access and hold Qualified Manufacturer's Representative status. This subcontract opportunity was posted on October 27, 2026, with a response deadline of January 14, 2027. The primary objective of the contract is the delivery of a fully commissioned and tuned DVR system.

Nebraska Public Power District

POSTED

about 14 hours ago

DEADLINE

DVR Control System Software Engineering & QAThis subcontract, issued by the Nebraska Public Power District, focuses on the software engineering and quality assurance for the DVR control system at the Cooper Nuclear Station. The scope of work involves the full software development lifecycle, including requirements analysis, computing system design, coding, and testing. Key technical responsibilities include configuring software variables for specific engineering units such as Volts, Amps, and MVAR, as well as implementing a rigorous software quality assurance program and a Traceability Matrix to manage test anomalies. The selected contractor is responsible for delivering fully functional software along with comprehensive operation, maintenance, and training documentation. This project falls under NAICS code 541511 and requires the contractor to support prime contractors on critical nuclear station projects. The response deadline for this opportunity is January 14, 2027.

Nebraska Public Power District

POSTED

about 14 hours ago

DEADLINE

RFQ: Susquehanna River Road Corridor Safety, Shared-Use Path and Quarry Park Access Improvements

Solicitation # BPM059336

The Town of Port Deposit, Maryland, in coordination with WILMAPCO, is seeking a multidisciplinary planning and engineering consultant team for the Susquehanna River Road Corridor Safety, Shared-Use Path and Quarry Park Access Improvements project. The scope of work involves establishing a context-sensitive safety strategy using the Safe System Approach, determining safe multi-modal access to the planned Hopkins Quarry Park, and evaluating and designing a shared-use path from Granite Avenue to Octoraro Park. The primary objective is the delivery of an actionable 30 percent design and basis-of-design package, with the potential for future Plans, Specifications and Estimates if funding permits. This is a qualifications-based selection process conducted in accordance with the Brooks Act and 23 U.S.C. 1122. Proposals are evaluated based on the proposed team and key staff, project understanding and approach, and related project experience, with each criterion weighted equally. Interested firms must submit a technical proposal of no more than 25 pages by November 16, 2026. Attendance at the pre-proposal meeting on October 28, 2026, at 11:30 AM is mandatory for all submitting firms. The selected consultant must maintain professional liability insurance of at least 1,000,000 dollars per occurrence and comply with federal provisions regarding civil rights, equal opportunity, and suspension and debarment eligibility. While the Disadvantaged Business Enterprise contract goal for Phase I is zero percent, all nondiscrimination and reporting obligations remain in effect. Because this is a qualifications-based selection, firms are instructed not to submit fee or price information; compensation will be negotiated with the highest-ranked firm following the evaluation process.

Town of Port Deposit

POSTED

about 14 hours ago

DEADLINE