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Operating in Northeast Wyoming

since 1974

Learn more about M&K Oil Company, LLC.


M&K Oil Company has been operating oil and gas wells in Northeast Wyoming since 1974.  Utilizing experienced people and a fleet of service equipment to maintain and repair more than 650 operated wells, M&K Oil Company gets the job done right.  It relies on the experience in operating oil and gas wells and the knowledgeable personnel to maintain its advantage as an operator in the oil and gas wells in Northeast Wyoming.

At M&K Oil Company, our goal is to efficiently and safely produce oil and gas in Northeast Wyoming, providing over 40 years experience and over 70 local knowledgable employees.  We provide mission critical services such as anchor testing and setting, hot oil trucks, roustabout service, work over rigs, downhole pump repair, and vac trucks, this is ensuring to provide the best possible product. 

To maintain the highest standards of operations, the anchors are tested and certified annually to ensure great depths of 10' and certified to OSHA standards. 

M&K Oil Company doesn't stop there, it is through the sister company, Mac Drilling, LLC, providing exploratory and development drilling to 11,000 feet. To learn more about Mac Drilling, LLC, click here.




M&K Oil Company, LLC. ("M&K"), has been operating wells in Wyoming since 1974, when C.M. "Mac" McLeland, his son Jim McLeland, and Bill Klodt drilled their first well.  M&K is now under its third generation of McLeland management and intends to continue to operate oil and gas wells in Northeast Wyoming for generations to come.  The success of M&K has opened the doors for a drilling company which has drilled over 200 wells since its inception, a gas gathering network, and lease hold companies.


Jim, Mac and Nathan have always kept a simple philosophy in the oil and gas business from acquiring leases, drilling wells and operating them; keep costs in line, take care of your investors and don't slow down.



Click here to visit the Mac Drilling site

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Interested in working for us?

Apply Today!


Our value & commitment to safety

At M&K Oil Company nothing is more important than ensuring everyone gets home safely at the end of the day. M&K's safety program is comprehensive, covering all aspects of our operations. M&K employees are empowered and encouraged to participate in planning safety topics related to the challenges employees face, both in the field and the general hazards of the oil and gas industry.



Jim McLeland


When Jim McLeland founded M&K Oil Company over 40 years ago in Northeastern Wyoming, he knew he wanted to create a company with strong community ties.


Read more about Jim>

Nathan S. McLeland


Nathan manages the operations of M&K Oil Company with the mission of valuing everyone's safety and creating a cohesive and productive work environment.


Read more about Nathan>



Vice President of Land

Erik is lead for business owner relations and development when it comes to the review of oil & gas interests.

Read more about Erik>




Overseeing the financials for M&K Oil Company, Chet comes with an MBA from University of Wyoming and 15 years experience in the mining and oil & gas industries. 

Read more about Chet>


Corporate Office

Gillette location

901 South 4-J Rd.

Gillette, WY 82716

Phone: 307-682-8047


Land and Business Development ext. 107

Accounts Payable ext. 104

Safety ext. 103

Joint Interest Billing ext. 108

Field Office

Newcastle location

4503 US Hwy 16

Newcastle, Wyoming 82701

Field Office Finn-Shirley

Field Office


923 Grieves Rd.

Newcastle, Wyoming 82701


For any inquiries, questions or commendations, please call: 307-682-8047 or fill out the following form

Interested in working with us?

Click here to fill out an application. 

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