Our People
Personnel Summaries
Leonard C. Slosky, R.E.A., P.E.S.

Leonard Slosky is an environmental scientist with over 30 years of experience. He is an active member of the ASTM committee that developed the 2005 ASTM Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process. Mr. Slosky is a Professional Environmental Scientist (Colorado) and a Registered Environmental Assessor (California).

Prior to founding Slosky & Company in 1985, Leonard Slosky was Assistant to the Governor of Colorado for Science, Technology, and Environmental Policy. He was a staff director in the Office of Science and Technology Policy, Executive Office of the President (White House) and served on an interagency committee of the National Security Council. He has testified before committees of the U.S. Congress eight times concerning environmental and waste management issues. Mr. Slosky provided leadership and expertise in low-level radioactive waste management on a committee of the National Academy of Sciences. In recognition of his policy contributions, the U.S. Secretary of Energy appointed Mr. Slosky to the Waste Isolation Pilot Plant Blue Ribbon Panel. He was the co-chair of the Denver Metro Chamber of Commerce’s Environment Committee.

Currently, Mr. Slosky offers his expertise in the transformation and redevelopment of contaminated properties to risk-adverse financial institutions, real estate developers, and law firms.

Eric P. Bunnell, P.E., P.G.

Eric Bunnell, has a Master’s Degree in Engineering from Colorado School of Mines, and a Bachelor’s Degree in Engineering from the University of Missouri-Rolla. He is a Professional Engineer in Colorado and New Mexico and a Licensed Professional Geologist in Texas. Mr. Bunnell holds Nuclear Density Gauge Use Certification and U.S. Army Corp of Engineers Construction Quality Management for Contractors Certification.

Mr. Bunnell has 15 years of extensive experience in environmental engineering associated with site characterization and remediation, and geotechnical site characterization and laboratory/field-testing of soils. His experience includes remedial, environmental and geotechnical investigation, periodic groundwater monitoring, hazardous waste site remediation and hydro-geologic studies.

As a project manager, Mr. Bunnell has provided leadership on well abandonment projects, tailing spill cleanup, and installation of high performance hydrocarbon skimmers in monitoring wells. As a hydrogeologist he has provided groundwater sampling, data evaluation, and the production of groundwater contour maps and chemical isoconcentration maps. Under his leadership, data collected from site characterizations have been used in determination of future site characterization activities, remedial alternatives, and site closure.

For Slosky & Company, Inc., Mr. Bunnell manages environmental due diligence and remediation planning for major national real estate investors and developers.

Andre Gonzalez, C.I.H.

Andre Gonzalez has over 25 years of experience in industrial hygiene, safety, and environmental remediation. He is certified in the comprehensive practice of industrial hygiene. His areas of expertise include asbestos and lead identification and management; beryllium compliance; indoor air quality; air contaminant sampling and interpretation of analytical results; construction and demolition safety, hazardous waste cleanup; employee training (confined space entry, hazard communication, etc.); health and safety plan preparation and implementation. 

Shane P. Holunga

Shane Holunga holds a Masters Certificate in Environmental Management. He is a senior project manager with 20 years of environmental experience, and is a Recognized Environmental Professional in the state of Colorado.

Mr. Holunga has extensive experience in leading Environmental Health and Safety efforts for multi-million-dollar international oil and gas exploration and production, managing EHS programs for assets in the United States, Canada, Brazil, and Argentina, and ensuring regulatory compliance in all geographies.  His experience also includes overseeing environmental due diligence work, including wellsite and facility field audits, as well as collaborating with executives to complete mergers, acquisitions, and divestments of various assets.

As a program manager and on-site field geologist, Mr. Holunga’s experience has included site assessment, remediation and reclamation, cost-estimate and budget tracking, regulatory compliance, report preparation, and project closures.  Additionally he has years of experience in performing various natural resource assessments and monitoring, as well as interpreting the ecological impacts of air, soil, and groundwater data on future site activities.

With Slosky & Company, Inc., Mr. Holunga is responsible for the environmental due diligence and management of large mixed-use developments for major national real estate investors and developers.  He also leads the firm’s oil and gas consulting practice, assisting clients with environmental assessment, remediation, and regulatory compliance.  His regulatory expertise includes projects governed by EPA, OSHA, DOT, BLM, NRC, RCRA, CERCLA, HAZWOPER, HAZCOM, ISO 14001, and ISO 18001.

Clinton (Clint) S. Werden, P.G.

Clint Werden, who has a Bachelor’s degree in Geology from Texas A&M University, is a senior project manager with 25 years of environmental experience, and is a licensed Professional Geologist in Utah and Wyoming.

Mr. Werden has extensive experience in project management at industrial facilities, mine sites, refineries, streams, an estuary, munitions ranges, military bases, and oil and gas well fields, including site characterization for environmental impacts for soil, groundwater, surface water, sediment, and air; Phase I/II ESA records reviews; and due diligence and compliance for acquisitions, divestment, and property transactions for commercial and industrial properties.

He has also supported permit preparation and reviews, SPCC and SWPPP compliance updates, solid and hazardous waste management and records reviews, best management practices evaluations and recommendations, product evaluation and substitution, EPCRA Tier 2 reporting, green and sustainable remediation, and regulatory compliance and risk evaluation.  As a leader for decision-making initiatives and regulatory compliance initiatives, Mr. Werden is intimately familiar with CERCLA, RCRA, EPA, ESA, CWA, and OSHA regulations, and has presented technical and regulatory strategies to regulators and the public, including public meetings and community availability sessions to inform/align/partner with stakeholders.

With Slosky & Company, Inc., Mr. Werden is responsible for the environmental management of multiple large-scale mixed-use developments for major national real estate developers and investors. 

He managed a 12-month, $2.5M construction work-out and repair project for a senior living facility in St. Louis, Missouri, where he led all planning, coordination, and oversight of mold remediation, selective demolition and repair, mechanical and plumbing systems repairs, and resident relocation support for 101 occupied apartments.  In addition, he had direct responsibility for permitting oversight, cost and schedule control and maintenance, and managing owner’s coordination and relations.