Mark Duff
Chief Executive Officer at PERMA-FIX ENVIRONMENTAL SERVICES, INC.
Net worth: 1 M $ as of 2024-03-30
Profile
Mark James Duff is currently the President, Chief Executive Officer & Director at Perma-Fix Environmental Services, Inc. He is also the President & Director at Safety & Ecology Holdings Corp.
Previously, he held positions as Vice President at Leidos, Inc., President at Timios National Corp., and President at Safety & Ecology Corp.
Mr. Duff completed his undergraduate degree at The University of Alabama and holds an MBA from the University of Phoenix.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2024-02-11 | 110,952 ( 0.81% ) | 1 M $ | 2024-03-30 |
Mark Duff active positions
| Companies | Position | Start |
|---|---|---|
| PERMA-FIX ENVIRONMENTAL SERVICES, INC. | Chief Executive Officer | 2017-09-07 |
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. | President | - |
Former positions of Mark Duff
| Companies | Position | End |
|---|---|---|
Leidos, Inc.
 Leidos, Inc. Information Technology ServicesTechnology Services Leidos, Inc. provides scientific, engineering, systems integration and technical services and solutions. It offers solutions and services that leverage the power of data analytics, systems integration, and cyber security across national security, health, and engineering markets. The company was founded by John Robert Beyster in June 1969 and is headquartered in Reston, VA. | Corporate Officer/Principal | - |
| HOMELAND SECURITY CAPITAL CORP. | President | - |
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. | President | - |
Training of Mark Duff
| The University of Alabama | Undergraduate Degree |
| University of Phoenix | Masters Business Admin |
Experiences
Positions held
Connections
1st degree connections
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Listed companies | 1 |
|---|---|
| PERMA-FIX ENVIRONMENTAL SERVICES, INC. | Industrial Services |
| Private companies | 4 |
|---|---|
Leidos, Inc.
Leidos, Inc. Information Technology ServicesTechnology Services Leidos, Inc. provides scientific, engineering, systems integration and technical services and solutions. It offers solutions and services that leverage the power of data analytics, systems integration, and cyber security across national security, health, and engineering markets. The company was founded by John Robert Beyster in June 1969 and is headquartered in Reston, VA. | Technology Services |
Timios National Corp.
 Timios National Corp. Real Estate DevelopmentFinance Timios National Corp. engages in the acquisition, development and consolidation of real estate services related businesses. It focuses on creating long-term value by taking controlling interest and developing its subsidiary companies through operations and management. The company was founded on August 12, 1997 and is headquartered in Arlington, VA. | Finance |
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. | Commercial Services |
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. | Commercial Services |
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