Green Hills Software LLC

Green Hills Software LLC, a for-profit limited liability company headquartered in Santa Barbara, California, sells embedded software development tools and real-time operating systems to the Department of Defense and civilian federal agencies as a prime contractor (82% of recent awards) and as a subcontractor on major defense platforms. The vendor operates without SBA set-aside designations across its federal footprint, competing on a full-and-open basis. Green Hills' primary products include the INTEGRITY real-time operating system family (particularly INTEGRITY-178 and INTEGRITY-178B variants with tuMP multiprocessing and ARINC-653 compliance), the MULTI integrated development environment, AdaMULTI and Ada95 compilers, and associated debugging and file-system tools. The vendor maintains three named subsidiaries: Green Hills High-Assurance Solutions LLC, Integrity Global Security LLC, and Green Hills Software, Inc.

Naval commands dominate Green Hills' customer concentration. The top five funding agencies account for 60% of recent awards by count, anchored by the Department of the Navy Naval Air Warfare Center (91 awards, $4.8 million combined potential value), the Naval Sea Systems Command (55 awards, $6.9 million), and the Information Warfare Systems Command (44 awards, $3.8 million). The Department of the Air Force Materiel Command Warner Robins Air Logistics Complex places 35 awards valued at $5.2 million. The rankings by potential value shift slightly — NAVSEA rises to dominance at $6.9 million across 55 awards, while NAWC's 91 awards carry lower per-award values typical of software renewals and maintenance. Combined, Navy and Air Force commands account for 86% of potential value across the vendor's recent portfolio. Award frequency has grown substantially: fifteen awards in 2022, twenty-three in 2023, thirty-six in 2024, and thirty-nine in 2025. Five awards valued at $4.6 million face recompete within the next twenty-four months.

Green Hills' award portfolio centers on software licenses, maintenance renewals, and technical support contracts rather than development efforts. Representative prime work includes a $4.1 million firm fixed-price purchase order from Naval Sea Systems Command (September 2025) for INTEGRITY-178 tuMP real-time operating system products, software licenses, and annual technical support services at Naval Surface Warfare Center Dahlgren Division; a $1.24 million firm fixed-price purchase order from NAVSEA (August 2024) for INTEGRITY-178 tuMP RTOS products and support; a $438 thousand definitive contract from the Naval Air Warfare Center (September 2022) for AdaMULTI and INTEGRITY-178 tuMP product-line development; and a $1.377 million purchase order from Warner Robins Air Logistics Complex (June 2022) for Green Hills software. Most recent awards are purchase orders for license renewals and annual support, with cycle patterns driven by fiscal-year budget periods rather than contract development schedules.

Green Hills operates as a subcontractor across the prime defense industrial base, particularly on programs with embedded-software criticality. Major primes routing work through Green Hills include Northrop Grumman Systems Corp (primary customer, multiple Ground-Based Strategic Deterrent engineering and manufacturing development sub-awards), The Boeing Company (C-17 Globemaster III sustainment and MQ-25 unmanned aerial vehicle engineering), Lockheed Martin Corporation (C-130J aircraft delivery, Next Generation Overhead Persistent Infrared geosynchronous satellite, and weapon-system development programs), Raytheon Company (functional area systems engineering and missile test software), Rockwell Collins Inc. (Common Very Low Frequency and B-2 strategic bomber sustainment), and Science Applications International Corporation (software life-cycle development). Sub-award flows indicate Green Hills supplies embedded software licenses, maintenance support, and specialized toolchain access to prime contractors integrating complex defense systems. Recent sub-awards span February 2026 through 2024, with concentration among programs requiring proprietary INTEGRITY-178 variants, MULTI development environments, and associated Board Support Packages for PowerPC and other processor architectures.

Top NAICS codes are Software Publishers (234 awards), Custom Computer Programming Services (26 awards), and Aircraft Manufacturing (16 awards). Top PSC codes track software licensing and application development, with Information Technology Software (203 awards) and IT Application Development Software perpetual-license products (18 awards) dominating. Green Hills operates through five named parent vehicles, with an Indefinite Delivery Contract (FA852621D0001) carrying six task orders. The vendor's award pattern reflects a mature, high-switching-cost incumbent position in defense embedded-software infrastructure: sole-source procurements are routine, award cycles align with fiscal-year budget execution, and customer concentration is extreme and persistent across Navy and Air Force materiel-command structures.