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Brown, Chism & Thompson PLLC offer tax services ranging from simple individual tax returns through the most complex business and multi-state tax returns. As one of the most trusted CPA firms in Tulsa, OK, Brown, Chism & Thompson PLLC rely on their three underlying principles of professionalism, responsiveness, and quality to ensure they are always providing the most outstanding service to clients across the Oklahoma area.

In managing Environmental, Health, Safety (EHS) Compliance for more companies than any other organization in North America, VANGUARD ENVIRONMENTAL, INC. is the foremost regulatory compliance management company on this continent, serving a diverse clientele in the ever-evolving precision due diligence and implementation of each client's site-specific Environmental Management System for over 60 EPA, OSHA, & DOT Compliance Laws impacting industry. Vanguard's mission-control style combines the departmental expertise of Engineering, Environmental Science/Technology, OSHA Education/Training, and Regulatory Specialists supported by a Vanguard-copyrighted $20MM intellectual property (largest regulatory compliance data base in the U.S.) to screen and manage the client's EHS compliance against "The Government's Benchmark," thus satisfying the client's regulatory compliance and deadlines for Total Quality Environmental Management. Vanguard's Compliance Gap Analysis yields such deliverables as the client's Regulatory Compliance Agenda, Regulatory Calendar & Deadlines, OSHA-Style Walk-Through, Decision Matrix and Online Hazardous Materials Management Program. Vanguard's philosophy features a flat-rate cost as opposed to excessive hourly fees.