Caribou cross the snow with a rig in the background.

Leadership Team

Meet Our Leaders

Sharon Lechner

Sharon Lechner ~ President

Sharon Lechner was appointed Nordic Calista President in January 2020; previously Sharon has served as Calista’s CFO for the prior decade. During her tenure as Calista CFO, Sharon served as Calista’s Nordic member representative alongside the other JV partner. She also serves as a Director of Delta Constructors, an Oil and Gas service provider operating primarily in Alaska’s North Slope, Texas, New Mexico, and North Dakota. Sharon is also president of the JV’s owner, Ookichista Drilling Services, Inc. and Acting President of Ookichista’s owner, Bektuq Holding, LLC.

Before Calista, Sharon served as the first Corporate Tax Director for Bristol Bay Native Corporation, CFO of the Municipality of Anchorage, CFO of the Anchorage Water and Wastewater Utility, Controller of the Municipality of Anchorage, and Senior Audit Manager at KPMG, LLP. Sharon is particularly specialized in Corporate Taxation and natural resource depletion issues.  

Sharon holds an BA and MBA from the University of Washington and is a CPA (inactive license).


Udo Cassee

Udo Cassee ~ General Manager

Udo Cassee was appointed Nordic Calista’s General Manager upon Calista’s January purchase of the majority joint venture owner; previously Udo had served in several management roles since he started with Nordic in 2003. Most recently, Udo served as Nordic’s Operations Manager. Before Nordic, Udo spent 11 years of his oilfield career with Schlumberger where he worked through different field, engineering, and management positions in the Netherlands, Norway, the UK and Alaska. He has extensive experience in the rig and service industry, offshore, onshore and Arctic operations.

Udo holds a BS in oil and gas technology from the University “Noorder Haaks” in Den Helder, the Netherlands.


Ben Wedin ~ Operations Manager

Ben Wedin has over 23 years of tenure with Nordic Calista. Ben began his career with Nordic in Kuparuk Field doing workovers and sidetracks on Nordic’s Rig #2 for ARCO Alaska. He then spent the next 10 years working in the field on all three of Nordic’s rigs gaining experience with drilling, sidetrack, workover, completion, and underbalanced drilling with coiled tubing. He worked as Nordic’s Field Superintendent from 2007 until 2019, participating in all Nordic’s Alaska business activities.


Jeff Kolean

Jeff Kolean ~ HSET Manager

Jeff Kolean has been with Nordic since 2011 as its HSET Manager. During his tenure at Nordic Calista, Jeff was the American Society of Safety Engineers Alaska Chapter President and served four years on its Board. Jeff currently volunteers as an IFC trainer and an active invited speaker in safety conferences including the 2018 IADC National HSE conference, multiple Governor’s Safety and Health Conferences, and the ASSE/ASP annual Alaska Conference. Prior to Nordic, Jeff worked four years at OSHA as an officer and two years for Rowan Drilling in Cook Inlet and the North Slope. Jeff has a BBA in Business from UAA. He has certifications in Maritime, Industry, and Construction from the Dept. of Labor OSHA Training Institute.