Serving oil and gas customers for over 20 years.

Our firm's focus is to be technical, strategic, and relational managers. We will maintain, in all situations, a positive position with customers and our manufacturers. We are responsible for selling Files and Associates products and services throughout our assigned territory and our customer base. We will reach business targets and sales goals through effective management of communication and physical visits to customer offices and plant sites. We will also develop ongoing, profitable relationships with customers as well as each of the manufacturers represented and continually maintain a professional image of Files and Associates through integrity, passion, strong work ethic and in-person presentation skills.


Connect with Drew

Cell: 918-630-3717


Drew Files, Owner/Representative

After graduating from Oklahoma State University with a degree in Mechanical Engineering Technology, Drew worked as an Applications Engineer and later as a Sales Manager in the air cooler industry.  In 1994 Drew formed Files and Associates, a manufacturer's representative focused on providing quality goods and services to the oil and gas industry.

Outside of work, Drew spends a lot of time volunteering in the US and abroad.  Some of the groups he is heavily involved in include:

What's Your Legacy

Bless The Children Ministries

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Connect with Keith

Cell: 918-863-4600


Keith Proffitt, Representative

Keith graduated from Oklahoma State University in 2006 with a degree in Mechanical Engineering, and has worked his entire career in the oil and gas industry.  Keith has worked as Controls Engineer and Applications Engineer in the combustion industry, with a focus on flare systems.  He also spent a couple of years working as the Business Development and Proposal Manager at an EPC before joining Files and Associates in 2015.


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Stefanie Graham, Sales Engineer

Stefanie is a graduate of Oklahoma State University with 19 years of experience in the oil and gas industry. She worked with Files and Associates from 1998 - 2014 as a Manufacturer's Representative, during which time she focused on sales, project management, office management, and achieved a top 5 national sales representative rating. In 2014, Stefanie gained valuable experience when she went to work for UOP Callidus in their Aftermarket and Project Execution groups. She returned to work for Files and Associates in 2017. 

Connect with Stefanie

Cell: 918-630-9200



Mark Hackler, Regional Manager

Mark holds a BS degree in Petroleum Engineering & Technology from Oklahoma State University and has more than 32 years of work experience within the Oil & Gas and Energy sector. Histechnical background and work experience qualify him as an industry professional in energy project management, project planning and engineering practices.  He has served in roles from a Project Engineer to a Project Manager.  Mr. Hackler has been a member of the Society of Petroleum Engineers (SPE) since 1983 and is also a member of the Project Management Institute (PMI). 

Connect with Mark