About Us

Our Mission

  • To be the leading provider of environmental consulting and engineering services in the markets we serve
  • To make client service our top priority
  • To provide employees a place where they can live, grow, and thrive both professionally and personally
  • To provide a comfortable, cooperative, supportive, and enjoyable work atmosphere

Our History


Company formed as Cinnabar Environmental Services in Tulsa, OK


Opened office location in Oklahoma City, OK


Moved offices in Tulsa to accommodate growth/expansion


Changed company name to Blackshare Environmental Solutions

Opened office location in Dallas, TX

Moved offices in Oklahoma City to accommodate growth/expansion


Moved offices in Dallas to accommodate growth/expansion


Celebrated 10 years in business!


Celebrated 20 years in business!

Management Team

Derek Blackshare

Derek Blackshare

Chief Executive Officer & President

Derek has 25+ years of environmental consulting and engineering experience. He is widely recognized as an expert on environmental issues in real estate and in compliance with RCRA, CERCLA, SARA (EPCRA), CWA permitting, CAA Permitting, and NEPA. Derek holds a Master of Science in Industrial Engineering & Management, and a Bachelor of Science in Mechanical Engineering.

He is a registered Professional Engineer (PE) in Oklahoma, Tennessee, Texas, and Georgia. He is also a Certified Hazardous Materials Manager (CHMM). Derek is a graduate of Leadership Oklahoma Class XXIV. He also instructs a graduate-level college course on hazardous materials and environmental compliance and is on the Environmental Programs Advisory Board (EPAB) for Oklahoma State University.

Feel free to contact Derek at 918-388-0970 or via email at dblackshare@blackshare-env.com

Sandra Wylie

Sandra Wylie

Chief Operating Officer

Sandra is a 30+ year veteran of accounting and office management for professional services firms. She has been with Blackshare since its inception in 2000. As COO, Sandra is responsible for managing all aspects of our company’s day-to-day operations. She oversees resource allocation to ensure project deadlines are met in coordination with Project Managers. In addition, Sandra reviews and maintains all contracts and assures deliverables meet obligations. She also coordinates invoicing, ensuring that it is correct and in compliance with client needs and contractual requirements.

Sandra also is responsible for developing the overall corporate budget including revenue and sales growth, expense, cost and margin control; and monthly financial goal management. Sandra tracks revenue and costs against budget, updates forecasts monthly, and recommends when staff additions and/or capital expenditures are necessary. Finally, Sandra is the management contact for both vendors and clients.

Feel free to contact Sandra at 918-388-0970 or via email at swylie@blackshare-env.com

Christi Latham

Christi Latham

Client Service Manager

Blackshare Environmental Solutions is pleased to announce that Christi Latham has recently joined the company as the Client Service Manager in the Tulsa, Oklahoma office. Christi is responsible for client management and business development. She coordinates Blackshare’s marketing initiatives for all of Oklahoma.

Christi has 20 years of account management experience in several areas including oil and gas and manufacturing. She attends trade shows and actively participates in many trade organizations.

Christi also participates in projects to stay current on developments for the services Blackshare provides. She is a member of Certified Commercial Investor Members (CCIM), Pipe Liners of Tulsa, Oklahoma Aggregates Association (OKAA), Oklahoma Asphalt Pavers Association (OAPA), Inter-Tribal Environmental Council (ITEC), the Environmental Federation of Oklahoma (EFO), and the Oklahoma Municipal League (OML).

Feel free to contact Christi at 918-388-0970 or via email at clatham@blackshare-env.com

Murray Verbonitz

Murray Verbonitz

Project Manager

Murray Verbonitz has worked for Blackshare for over seven years and specializes in field work and sample collection related to Phase II investigations. Murray is familiar with proper sampling protocol including sample preservation for specific pollutants, preparing and maintaining strict chain-of-custody, and all quality control/quality assurance sample collection including duplicate samples, split samples, equipment (rinsate) blanks, field blanks, and trip blanks.

In addition, Murray has extensive experience with collection of soil and groundwater samples. He has investigated several types of property via Phase I investigations including industrial, oil and gas sites, dry cleaners, service stations, and commercial properties. Murray has completed Phase I Environmental Site Assessments (ESA) of more than 400 sites, many times for a regulatory agency.

Murray spends a significant amount of his time in the field – often drilling sites for a Phase II ESA or collecting grab or composite samples. He has performed site assessments of hundreds of oil and gas sites – many related to releases.

Murray is meticulous at maintaining proper documentation related to sample collection and equipment maintenance. He routinely prepares calibration and maintenance logs for all equipment used by Blackshare.

Feel free to contact Murray at 918-388-0970 or via email at mverbonitz@blackshare-env.com

The Blackshare Difference

A consulting company is only as good as its people. And Blackshare takes great pride in its people. The Blackshare team is comprised of professional engineers, biologists, chemists, geologists, hydrogeologists, and safety specialists.

Beyond their exceptional qualifications, the members of the Blackshare staff are effective communicators - an essential tool in dealing with the varying requirements and specific goals of a diverse client base. The Blackshare team identifies the needs of the client before the project is undertaken by listening to the client first and then maintaining a sharp focus on the objectives throughout the project. Qualified, experienced, and responsive people all rolled into one company - that's the Blackshare difference.

The Blackshare Approach

Environmental and safety projects vary greatly. Yet neither the size nor the complexity affects Blackshare's determination and commitment to success. From the Phase I environmental site assessment (ESA) on an undeveloped parcel to complicated industrial site remedial investigations and feasibility study (RI/FS), Blackshare matches its best resources with the challenges presented by the project.

Blackshare is accustomed to playing varying roles for its clients. The company may be called upon for a single task such as a storm water or air permit for one client, while another will use Blackshare as its in-house environmental and/or safety staff to assume responsibility for all day to day compliance issues. Blackshare has the capability and flexibility to manage an entire project or provide staff to assist projects actively managed by the client.

Environmental and safety issues have a dual bottom line: compliance and risk tolerance. Clients know that in bringing them into and maintaining compliance, Blackshare fully explores all options and recommends those that make the most economic sense.