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Øystein Moksheim Kalleklev
Chief Executive Officer at
AVANCE GAS HOLDING LTD
Profile
Øystein Moksheim Kalleklev is currently Chief Executive Officer at Avance Gas Holding Ltd. since 2025 and Chief Financial Officer at Knutsen NYK Offshore Tankers AS since 2013.
Former roles include Chief Executive Officer at Flex LNG Management Ltd. and Flex LNG Management AS from 2018 to 2025, Chief Executive Officer at FLEX LNG Ltd. from 2017 to 2025, Executive Chairman at Avance Gas.
AS from 2021 to 2023, Chairman at KNOT Offshore Partners GP LLC from 2015 to 2017, Managing Director at Umoe Invest AS, Director at Kagra Gruppen AS, Chief Financial Officer at Umoe Gruppen AS, Partner at Clarksons Norway AS, and Chief Financial Officer at Knutsen NYK Offshore Tankers AS.
Education includes undergraduate studies at Heriot-Watt University and an MBA from the Norwegian School of Economics & Business Administration.
Øystein Moksheim Kalleklev active positions
| Companies | Position | Start |
|---|---|---|
| AVANCE GAS HOLDING LTD | Chief Executive Officer | 2023-04-23 |
Knutsen NYK Offshore Tankers AS
 Knutsen NYK Offshore Tankers AS Marine ShippingTransportation Owns and operates crude oil shuttle tankers | Director of Finance/CFO | 2012-12-31 |
Former positions of Øystein Moksheim Kalleklev
| Companies | Position | End |
|---|---|---|
Flex LNG Management AS
 Flex LNG Management AS Miscellaneous Commercial ServicesCommercial Services Provides administrative services | Chief Executive Officer | 2025-12-04 |
| FLEX LNG LTD. | Chief Executive Officer | 2025-03-30 |
FLEX LNG Management Ltd.
 FLEX LNG Management Ltd. Oil & Gas ProductionEnergy Minerals Engages in extraction and marketing of liquefied natural gas | Chief Executive Officer | 2025-03-30 |
Avance Gas AS
 Avance Gas AS Air Freight/CouriersTransportation Provides transportation services for bulk liquid chemicals | Chairman | 2023-05-07 |
| KNOT OFFSHORE PARTNERS LP | Chairman | 2016-12-31 |
Training of Øystein Moksheim Kalleklev
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
35
1st degree connections
13
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 13 |
|---|---|
KNOT Offshore Partners GP LLC
 KNOT Offshore Partners GP LLC Marine ShippingTransportation Owns and operates shuttle tankers | Transportation |
Umoe Gruppen AS
 Umoe Gruppen AS Financial ConglomeratesFinance Provides investment services that specializes in the green energy and services sectors | Finance |
Umoe Invest AS
 Umoe Invest AS Financial ConglomeratesFinance Provides investment services | Finance |
Heriot-Watt University
 Heriot-Watt University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Norwegian School of Economics & Business Administration
 Norwegian School of Economics & Business Administration Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
FLEX LNG Ltd.
 FLEX LNG Ltd. Marine ShippingTransportation Engages in the production, transportation and development of offshore liquefied natural gas | Transportation |
Clarksons Norway AS
 Clarksons Norway AS Air Freight/CouriersTransportation Provides ship and offshore brokerage services | Transportation |
Kagra Gruppen AS
 Kagra Gruppen AS Financial ConglomeratesFinance Offers investment activities aimed primarily at the equity market and real estate activities | Finance |
Avance Gas AS
Avance Gas AS Air Freight/CouriersTransportation Provides transportation services for bulk liquid chemicals | Transportation |
FLEX LNG Management Ltd.
FLEX LNG Management Ltd. Oil & Gas ProductionEnergy Minerals Engages in extraction and marketing of liquefied natural gas | Energy Minerals |
Knutsen NYK Offshore Tankers AS
Knutsen NYK Offshore Tankers AS Marine ShippingTransportation Owns and operates crude oil shuttle tankers | Transportation |
Avance Gas Holding Ltd.
 Avance Gas Holding Ltd. Marine ShippingTransportation Operates gas carriers and provides liquefied petroleum gas transportation services | Transportation |
Flex LNG Management AS
Flex LNG Management AS Miscellaneous Commercial ServicesCommercial Services Provides administrative services | Commercial Services |
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