Mark Duff
Chief Executive Officer at PERMA-FIX ENVIRONMENTAL SERVICES, INC.
Net worth: 1 M $ as of 31/05/2024
Network origin in Mark Duff first degree
| Entity | Entity type | Industry | |
|---|---|---|---|
| Public Company | Environmental Services | 30 | |
Safety & Ecology Holdings Corp.
 Safety & Ecology Holdings Corp. Miscellaneous Commercial ServicesCommercial Services Safety & Ecology Holdings Corp. provides environmental, infrastructure and nuclear energy services. It offers construction, remediation, and demolition services, such as facility deactivation, decontamination, site closure, threat reduction, security, and federal facility specialty construction and environmental services. The company is headquartered in Oak Ridge, TN.
1
| Subsidiary | Miscellaneous Commercial Services | 1 |
Chart of Companies connected to the second degree
Multi-company connection
Companies connected to Mark Duff via their personal network
| Company | Sector | Related people | Main position |
|---|---|---|---|
| PRIVATE RENTED SECTOR S.A. | Biotechnology | Director of Finance/CFO Chief Executive Officer Corporate Officer/Principal Director/Board Member Director/Board Member Director/Board Member Director/Board Member | |
APTIM Federal Services LLC
 APTIM Federal Services LLC HomebuildingConsumer Durables APTIM Federal Services LLC provides construction and contractual services for residential and single family homes. The company is headquartered in Baton Rouge, LA. | Homebuilding | President Director/Board Member | |
| University of Michigan | College/University | Doctorate Degree Graduate Degree | |
B&W Technical Services Y-12 LLC
 B&W Technical Services Y-12 LLC Aerospace & DefenseElectronic Technology B&W Technical Services Y-12 LLC national security complex for department of energy and national nuclear security administration. Its complex makes, dismantles, refurbishes, stores & manages nuclear weapons & weapon components & secures nuclear material & equipment from foreign sources, downblends nuclear material & provides fuel for research and naval reactors. The company was founded in 2000 and is headquartered in Oak Ridge, TN. | Aerospace & Defense | Chairman Corporate Officer/Principal | |
| US Military Academy | College/University | Undergraduate Degree Undergraduate Degree | |
Ridge-Lane LP
 Ridge-Lane LP Investment ManagersFinance Ridge-Lane LP is an American company that offers strategic consulting and venture development services. The private company is based in Washington. The company was founded by R. Brad Lane and Thomas Joseph Ridge, and R. Brad Lane has been the CEO since its incorporation. | Investment Managers | Corporate Officer/Principal Corporate Officer/Principal | |
| George Washington University | College/University | Masters Business Admin Doctorate Degree | |
| University of Pittsburgh | College/University | Undergraduate Degree Graduate Degree | |
US Department of Energy (District of Columbia)
 US Department of Energy (District of Columbia) General GovernmentGovernment US Department of Energy Develops energy technologies for buildings, homes, transportation power systems and industry. The company was founded in 1977 and is headquartered in Washington, DC. | General Government | Corporate Officer/Principal Director/Board Member | |
Gulf Oil LP
 Gulf Oil LP Specialty StoresRetail Trade Gulf Oil LP operates as a wholesaler of refined petroleum products. It offers heating oil, diesel fuel, kerosene, premium dieselect, and gasoline products. It also produces a line of lubricants, including motor oils and specialty products, such as turbine oils, transformer oils, roll oils, textile oils, paper machine lubricants, steam cylinder lubricants, zinc-free oils, two-cycle oils, antifreeze products, and chain saw oils. The company was founded in 1901 and is headquartered in Framingham, MA. | Specialty Stores | Corporate Officer/Principal | |
Wilmerding Licensing Corp.
 Wilmerding Licensing Corp. Miscellaneous Commercial ServicesCommercial Services Westinghouse Electric Corp. engages in the distribution and marketing of home appliances. It offers air purification, bakeware and baking tools, blenders and juicers, ceiling fans, cookers and steamers, cooking utensils, cookware, electric cooktops, electric kettles, food preparation, and fryers. The company was founded by George Westinghouse in 1886 and is headquartered in Pittsburgh, PA. | Miscellaneous Commercial Services | Corporate Officer/Principal | |
Lockheed Martin Global, Inc.
 Lockheed Martin Global, Inc. Air Freight/CouriersTransportation Lockheed Martin Global, Inc. provides marketing and distribution services. The company was founded in 1975 and is headquartered in Bethesda, MD. | Air Freight/Couriers | Corporate Officer/Principal | |
Perma-Fix Northwest, Inc.
 Perma-Fix Northwest, Inc. Miscellaneous Commercial ServicesCommercial Services Perma-Fix Northwest, Inc. provides technical consulting services. The firm operates its business through three reportable segments: Treatment, Services and Medical. The company is headquartered in Richland, WA. | Miscellaneous Commercial Services | Corporate Officer/Principal | |
| SCIENCE APPLICATIONS INTERNATIONAL CORPORATION | Information Technology Services | Corporate Officer/Principal | |
Waste Control Specialists LLC
 Waste Control Specialists LLC Environmental ServicesIndustrial Services Waste Control Specialists LLC provides waste recycling services. It engages in processing, storing, and disposing hazardous, toxic, and low-level and mixed low-level wastes. The firm offers solutions for the proper and safe management of radioactive, hazardous, and mixed waste. Its clients include Amgen, Dynegy, Mactec. The company was founded in 1989 and is headquartered in Dallas, TX. | Environmental Services | Chief Operating Officer | |
| Perma-Fix Northwest Richland, Inc. | Corporate Officer/Principal | ||
| West Virginia University | College/University | Graduate Degree | |
| S K Hart Management LLC | Investment Managers | Director of Finance/CFO | |
TAS Energy, Inc.
 TAS Energy, Inc. Electric UtilitiesUtilities TAS Energy, Inc. engages in the provision of modular energy solutions for the power generation industry. It offers cooling products, data halls, and air cooled products. The company was founded by Thomas L. Pierson in 1999 and is headquartered in Houston, TX. | Electric Utilities | Chief Executive Officer | |
| LOCKHEED MARTIN CORPORATION | Aerospace & Defense | Corporate Officer/Principal | |
CTG LLC
 CTG LLC Engineering & ConstructionIndustrial Services CTG LLC is a tower infrastructure company. The private company is based in Charlotte, NC. Stanley Robert Cochran has been the CEO of the company since 2015. | Engineering & Construction | Chief Executive Officer | |
| B&W Y-12 LLC | Chairman | ||
| Robins E. Claiborne School of Business | College/University | Masters Business Admin | |
B&W Technical Services Group, Inc.
 B&W Technical Services Group, Inc. Miscellaneous Commercial ServicesCommercial Services Part of BWX Technologies, Inc., B&W Technical Services Group, Inc. provides scientific and technical services. The company is based in Idaho Falls, ID. | Miscellaneous Commercial Services | President | |
| Rice University | College/University | Undergraduate Degree | |
Visionary Solutions LLC
 Visionary Solutions LLC TruckingTransportation Visionary Solutions LLC provides solution for complex issue involving transportation and logistics, program management, reclamation and recycling, industrial, and training services. The company was founded in 2001 and is headquartered in Knoxville, TN. | Trucking | Corporate Officer/Principal | |
Safety & Ecology Corp.
 Safety & Ecology Corp. Miscellaneous Commercial ServicesCommercial Services Safety & Ecology Corp. provides environmental engineering and contract services. It offers construction, remediation and demolition, environmental services and environmental technology. The company was founded by Christopher P. Leichtweis in 1991 and is headquartered in Knoxville, TN. | Miscellaneous Commercial Services | Corporate Officer/Principal | |
S.K. Hart Management LLC
 S.K. Hart Management LLC Financial ConglomeratesFinance S.K. Hart Management LLC is a private investment company based in Salt Lake City, UT. The company also has an office located at 630 E. South Temple in Salt Lake City. Additionally, the metadata includes information about Trolley Square, a shopping center located on the corner of 600 South and 700 East in Salt Lake City, and Bayview Newport Beach, a location in California. The company's main focus is not explicitly stated in the provided metadata, but it can be inferred that they invest in various industries. | Financial Conglomerates | Director of Finance/CFO | |
| Subsurface Technologies, Inc. | Director/Board Member | ||
Pony Express Land Development, Inc.
 Pony Express Land Development, Inc. Real Estate DevelopmentFinance Pony Express Land Development, Inc. provides real estate development services. The private company is based in Salt Lake City, UT. | Real Estate Development | Director/Board Member | |
| University of Oklahoma | College/University | Undergraduate Degree | |
Perma-Fix Medical Corp.
 Perma-Fix Medical Corp. Medical SpecialtiesHealth Technology Part of Private Rented Sector SA, Perma-Fix Medical Corp. develops and commercializes medical technology for the production of medical isotope. The company is based in Atlanta, GA. Perma-Fix Medical was acquired by Private Rented Sector SA from Perma-Fix Environmental Services, Inc. | Medical Specialties | Director/Board Member | |
| SK Hart Ranches Pty Ltd. | Director/Board Member | ||
| Indiana University of Pennsylvania | College/University | Undergraduate Degree | |
National Defense Industrial Association
 National Defense Industrial Association Miscellaneous Commercial ServicesCommercial Services National Defense Industrial Association engages in the defense and national security education. It offers courses such as configuration and data management certification program, defense systems acquisitions management, mastering business development, and certified modeling and simulation professional certification program. The company was founded in 1919 and is headquartered in Arlington, VI. | Miscellaneous Commercial Services | Director/Board Member | |
| PRECIGEN, INC. | Biotechnology | Corporate Officer/Principal | |
| TENNESSEE VALLEY AUTHORITY | General Government | Corporate Officer/Principal | |
Commonweal Ventures Management LLC
 Commonweal Ventures Management LLC Investment ManagersFinance Commonweal Ventures Management LLC (Commonweal Ventures) is a venture capital firm founded in 2021 by Nate Loewentheil. The firm is headquartered in New York. | Investment Managers | Consultant / Advisor | |
The National Press Club
 The National Press Club Miscellaneous Commercial ServicesCommercial Services The National Press Club is a professional organization for journalists founded in 1908. The club's multimedia production studios, located in the National Press Building, offer state-of-the-art production facilities to help connect live with audiences around the world and create compelling multimedia content. The National Press Club is based in Washington and is committed to protecting any personal information provided in connection with the use of their website. It has 3,000 members representing almost every major journalism organization and is a leading voice for press freedom worldwide. The club also offers an elegant venue with creative cuisine and impeccable service provided by their in-house catering team. | Miscellaneous Commercial Services | Corporate Officer/Principal | |
National Wildlife Federation
 National Wildlife Federation Miscellaneous Commercial ServicesCommercial Services National Wildlife Federation provides wildlife conservation services. Its services include restoring gray wolves, protecting the everglades, preserving wetlands, flood plain management, fighting effects of climate change and saving Alaska's Copper River Delta. The company was founded by Jay Norwood Darling in 1936 and is headquartered in Reston, VA. | Miscellaneous Commercial Services | Corporate Officer/Principal | |
| International Women’s Forum Uk Ltd. | Corporate Officer/Principal | ||
Arctaris Capital Partners LLC
 Arctaris Capital Partners LLC Investment ManagersFinance Arctaris Capital Partners LLC (Arctaris Capital Partners) is a private equity firm founded by Jonathan Tower in 2009. The firm is headquartered in Boston, Massachusetts. | Investment Managers | Director/Board Member | |
Walker-Miller Energy Services LLC
 Walker-Miller Energy Services LLC Electrical ProductsProducer Manufacturing Walker-Miller Energy Services LLC distributes energy-efficient products, including lighting, motors and electronic vehicle charging stations. It specializes in energy efficient voltage equipment to help commercial and residential customers decrease energy consumption. The company was founded by Carla Walker-Miller in 2000 and is headquartered in Detroit, MI. | Electrical Products | Director/Board Member |
Statistics
International
| United States | 47 |
| Poland | 2 |
| Netherlands | 2 |
| South Africa | 2 |
| United Kingdom | 2 |
Sectoral
| Consumer Services | 10 |
| Industrial Services | 8 |
| Commercial Services | 8 |
| Finance | 7 |
| Health Technology | 4 |
Operational
| Director/Board Member | 71 |
| Corporate Officer/Principal | 53 |
| Independent Dir/Board Member | 18 |
| Chairman | 16 |
| President | 15 |
Most connected contacts
| Insiders | |
|---|---|
| Joe Reeder | 25 |
| Kerry Duggan | 19 |
| John Climaco | 18 |
| Thomas Bostick | 17 |
| Stanley Robert Cochran | 13 |
| Larry Shelton | 11 |
| Jacob Lahav | 9 |
| Mark Zwecker | 9 |
| Joseph Grumski | 8 |
| Gary Kugler | 7 |
| George Taylor | 7 |
| Richard Grondin | 7 |
| Louis Francis Centofanti | 7 |
| Zach Wamp | 7 |
| Benio Naccarato | 6 |
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