DANIEL L. SUN, INC.
DANIEL L. SUN, INC. is a federal contractor, registered under UEI ER6NJMESJEC3 and CAGE code 4E5E4. It has been awarded $2,774,307 across 31 federal contracts. Primary work spans Software Publishers, Other Computer Related Services, and Software Publishers. Top awarding agencies include Department Of Energy and Western-Corporate Services Office.
Contact Information
Registration and classification details
Registration
UEI Code
ER6NJMESJEC3CAGE Code
4E5E4Entity Structure
Corporate Entity (Not Tax Exempt)Established
N/ABusiness Classifications
NAICS Codes
Federal Contracting Overview
Award totals, agency breakdown, NAICS distribution, and geographic footprint.
AI Capability Profile
Daniel L. Sun, Inc. specializes in software development, maintenance, and enhancement services for mission-critical federal systems, with deep expertise in iterative software lifecycle management and system modernization. The company delivers tailored solutions for complex technical environments, fo...
Daniel L. Sun, Inc. specializes in software development, maintenance, and enhancement services for mission-critical federal systems, with deep expertise in iterative software lifecycle management and system modernization. The company delivers tailored solutions for complex technical environments, focusing on sustained support, feature enhancements, and operational continuity for enterprise platforms. Their technical capabilities include software publishing, system integration, and custom development for high-assurance computing environments, with demonstrated proficiency in maintaining and evolving legacy systems through phased enhancements and sustained operational support. Key differentiators include agile delivery models, deep domain knowledge in government IT ecosystems, and a proven ability to execute under tight timelines while ensuring compliance with federal standards. The contractor has established a consistent and enduring relationship with the Department of Energy, delivering sustained maintenance, enhancement, and renewal support for critical IT operations and analytical platforms. Their work for this agency centers on iterative software improvements, system sustainment, and capability upgrades that ensure operational resilience and mission readiness across energy infrastructure and scientific computing environments. Industry focus is concentrated in software publishing and other computer-related services, reflecting a specialization in proprietary software development, system customization, and long-term software lifecycle management. This positions the firm as a niche provider for agencies requiring continuous software evolution rather than point-in-time procurement, with emphasis on maintainable, scalable, and secure codebases. As a Women-Owned Small Business and Woman-Owned Business certified firm based in San Jose, California, Daniel L. Sun, Inc. leverages its small business structure to deliver responsive, high-touch technical services tailored to federal mission needs. The company’s certifications underscore its commitment to diversity in federal contracting while reinforcing its credibility in competitive, compliance-driven environments.
Key Performance Metrics
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