About Us

"None of us are as smart or better than the rest of us, that is what makes CRG Texas Environmental an exceptional Team."

- Nubia Casler CRG Texas President

Leadership Team

Nubia Casler

Mrs. Casler’s work experience spans over 23 years of environmental and telecommunications consulting for government and corporate accounts. Mrs. Casler gained her practical environmental and construction and design build experience while employed for 15 years by a national telecommunications company in Bogota, Colombia. Her responsibilities include: Environmental Due Diligence Management, Marketing and Sales, Intelligent Building Design, Personnel Management, Customer Service, and Quality Control. Her experience is in new construction, existing renovations, and build-outs includes Private, Federal, and Municipal construction projects. Mrs. Casler has over 12 years of financial and environmental consulting experience. Mrs. Casler controls the business development, growth planning, and financial management aspects and is involved in the day to day operations of the company. Mrs. Casler also manages the strategic planning and benefits for employee partnership that promotes professional, technical, and personal growth for each employee of CRG Texas. Her relevant work expertise includes: business and marketing plan development, project personnel management and skill development, financial planning and control of all cash flow, client and subcontractor relations, diversity, human resources, and quality control.

President - Shareholder

Rosenberg, TX

Kevin Casler

Mr. Casler has over 32 years of experience in construction and environmental consulting and contracting.

Mr. Casler founded CRG Texas Environmental Services with his wife Nubia. He has conducted extensive environmental consulting activities, including: conducting Phase I, Phase II, and Phase II ESA activities; His expertise in planning and execution of environmental site assessment, spill response, and remediation-corrective action sites is exceptional in delivering high quality consulting and contracting services to our clients. Mr. Casler’s licenses and certifications include but is not limited to: TCEQ Registered Corrective Action Specialist (RCAS), TCEQ Corrective Action Project Manager (CAPM), and TCEQ Licensed On-site Supervisor (LOSS), where his practical experience is focused on commercial property, manufacturing, and industrial real estate environmental due diligence, site assessment, and corrective action. Mr. Casler will provide senior level management, client interaction, contract execution, and subcontracting throughout the USA.

Vice President - Shareholder

Rosenberg, TX

Melinda Frey

Mrs. Frey manages the office operations day to day and brings extensive administrative and financial experience to her position in which she has been connecting people, products, and solutions for over 20 years. Mrs. Frey joins CRG Texas from a builder and construction companies where she most recently served as the Office Manager and lead many initiatives to grow the company’s workforce and to connect with clients for a better service. Melinda manages our office and field staff health benefits, payroll and expenses, and fleet maintenance. Melinda is an integral part of the employee partnership program and assists the owners with key management tasks to foster growth of our personnel and our office.

Office Administrator

Ms. Swanson provides marketing and social media development for the company for the past 9 years. Her extensive experience in desktop publishing, social media advertising, monthly newsletters, and direct mail marketing has brought added value to the team through sustainable growth creativity. Alexis’ skills in WordPress, Adobe Illustrator and Microsoft Office have taken CRG Texas to the forefront of our products and services as a professional and reliable environmental services provider.


Social Marketing Certification

Advanced Social Advertising Certification

Marketing and Social Media Coordinator
John Hogue

Mr. Hogue has over 31 years of environmental compliance, assessment, and remediation experience.

Mr. Hogue is a registered professional geologist and a Certified Hazardous Materials Manager. Mr. Hogue has extensive experience in the management of complex environmental investigations, corrective action and regulatory negotiations, health and safety programs and projects on behalf of a diverse client base including oil and gas exploration, production, and transmission companies. He has managed and worked for federal, state and local regulatory agencies; law firms; industrial clients, local governments, and private owners overseeing the response action planning and implementation.

Senior Environmental Scientist

Mr. Jackson has over 35 years of environmental compliance, assessment, and corrective action experience.

Mr. Jackson is a Board Certified Environmental Professional (CEP), and provides ongoing support to the American Board of Environmental Professionals as a Mentor to aspiring CEPs. Mr. Jackson is a TCEQ Corrective Action Project Manage (CAPM) and Licensed On-Site Supervisor for Underground Storage Tank Removals and Remediation. Mr. Jackson’s expertise as an environmental scientist, senior project manager, and client service manager is exceptional high-quality services in environmental assessment and compliance. Mr. Jackson has worked with federal, state and local agencies, with private property owners and developers, and with industrial and manufacturing clients to bring environmentally distressed properties due to major disaster events into post productive use while reducing environmental risk exposure throughout the USA.

Senior Environmental Scientist Associate
Melinda Frey

Bachelor’s Degree in Geology May 2014 - University of South Alabama


Geoscientist in Training No. G.I.T. 208

DSHS Asbestos Inspector No. 603810

OSHA 40 HAZWOPPER Health and Safety

OSHA 8 Hour Refresher

Environmental Staff Scientist, G.I.T.
Melinda Frey

Camilo has worked with CRG Texas Environmental Services, Inc. since 2011 under the direct supervision of licensed professionals and technical specialists. Camilo is attending the University of Houston working towards his Bachelor's degree in Construction and Environmental Management. Camilo has attended workshops and has experience in the areas of stormwater quality, soil, and groundwater assessment, remediation system installation, operations and maintenance, contractor supervision, and Phase I and Phase II environmental due diligence. Responsibilities include preparation of sample kits, field equipment, and supplies for field assessments, coordination and oversight of drilling company staff and remediation contractors, contractor field inspection and oversight, and construction inspections, and reporting.


OSHA 40 HAZWOPPER Health and Safety
OSHA 8 Hour Refresher
Phase I Environmental Site Assessment Training

Environmental Technician IV