Coach Portrait

Mark J. Diley, PGA

Lead Instructor / Olney Golf Park


PGA Crest

Olney, MD
Olney Golf Park-Olney MD, Olney , MD

About Mark

Growing up in suburban Maryland, Mark was an incurable tinkerer.

He would dismantle, then reassemble, radios, appliances, bicycles and anything else that could be taken apart and put back together. It was this razor-sharp mechanical aptitude, an eye for detail and a passion for golf that have combined to allow this Mid-Atlantic native to be one of the most sought-after instructors in our area.

Today, Coach Mark can efficiently design and refine a better golf swing for anyone wishing to learn and improve. For Juniors, Beginners and Pros, Mark will add something to each students’ understanding.

Mark is widely known for his communication skills and patient manner with his students. His extraordinary knowledge combined with his ability to explain the necessary fundamentals in a clear and concise manner is why his students return to him time after time and year after year.

As a junior golf stand-out winning the Maryland State High School individual and team titles, Mark was highly recruited for college golf and granted a full four golf scholarship at the University of Maryland. He held the teams #1 player position for his last three seasons and as a senior, his teammates voted him as team Captain.

He became a PGA Member soon after graduation with his BGS Degree and pursued his dream of playing professional tournament golf and coaching others in the game he loves.

Aside from being a golf pro, Mark is an avid inventor having designed several golf training aids earning three US Patents. His focus has been in the art of putting, where one is of his products currently enjoys word-wide distribution with thousands of 'believers!’

Request that Mark reach out to you and discover for yourself how satisfying it can be to improve and learn the game in a comfortable and friendly setting.

Success if just a few Swings Away!

Begin your journey
Mark in Action

Recent Photos

Mark in Action

Recent Photos


"The time you spent with me today was just thrilling. It was for me a pulling back of the veil of ignorance and confusion that has kept me locked all these years inside a place of simply not understanding the golf swing."

Robb L.


"I wanted to thank you for the lesson yesterday morning. I appreciated your ability to break things down into simple concepts while never talking down to me. I look forward to attending more lessons in the future."

Mike H.


"Applying what I learned at my last lesson, I made a couple of nice iron shots last Monday. Frankly, they were beautiful. The video helped underscore the fault. My swing will continue to improve. We are on the right path.".

Wade B.

Mark's Experience

Helping players achieve their goals.

Getting Started

Learn the basics

Get comfortable for business golf

Avoid embarrassment on the first tee

Having More Fun

Connect with golfers of similar age

Have more fun on the course

Connect with golfers of similar skill

Improving Your Game

Break 100

Improve your Short Game

Make the high school golf team

Get swing diagnostic testing

Students & Lessons

Coaching Services

Player Type







Playing with disabilities

Session Type



Mark's Facilities

Olney Golf Park-Olney MD

Olney MD


Olney Golf Park is the Mid-Atlantic’s Premiere golf practice facility and home to the SMGA, the Golf 4 Kids Academy and the Performance Golf Academy. Located in Olney, MD, Olney Golf Park offers a country club type experience for the public with PGA & LPGA Golf Instructors, Club Fitters certified by all of our OEM Partners, on site club repair and the best Green Grass Golf Shop in the area. Everyone loves the island green, covered double deck heated tee line, 2 acre short game practice area, and state of the art teaching studio. Stop by to have some fun and hit some balls, or schedule a lesson to start improving your game today!

*Coaching available to public

3414 Emory Church Road, Olney , MD 20832

Begin Your Journey

Work with Mark

Contact Mark