About Us


Spinal Surgical Strategies, LLC was formed March 18, 2013 by Jeff Kleiner, MD, E. John Grimberg, Jr. and Harris Kirschner. Our goal was to fill an overlooked area in the realm of minimally invasive spinal surgery:  provide tools that make surgery easier for the surgeon and the patient.  This strategy has demonstrated improved patient outcomes and improved the fusion rates of interbody surgeries.

Our Motto: Do it right the first time™.

Mission Statement:  Spinal Surgical Strategies is committed to providing practical solutions to the most vexing of surgical problems.  Our goal is to allow spinal surgeons to have consistently excellent results by providing techniques and tools that solve problems.  We strive to have the simple elegance of our designs partner with our surgeons skills

Jeff Kleiner, MD

I trained at Stanford University, University of Colorado, Rush/Presbyterian-St. Luke’s Hospital in Chicago and University of CA at San Diego for pre-medical, medical and residency training.  I was a NIH postdoctoral fellow in the biochemistry of tendons and ligaments and I am fellowship trained in adult and pediatric reconstructive spinal surgery


My chief interest in medicine is the diagnosis of patients with a spinal malady and my practice is limited to the care and treatment of spinal disorders.  When surgical treatment is necessary, my repertoire consists of minimally invasive approaches to the spine.  I have developed a dozen patent pending strategies and tools to assist doctors in performing these types of surgeries.

John Grimberg

is a principal technical specialist for Ball Aerospace Technologies Corp.  He has been with the company for 19 years and currently supports the detector lab, assisting with such projects as building infrared and ultraviolet light detectors (cameras) for the Hubble Space Telescope and other space-born remote sensing instruments. 

He is also an acting design engineer for Spinal Surgical Strategies, developing specialized tooling for minimally invasive spinal surgical procedures.  He was born on a naval base in Portsmouth VA, but has lived in Colorado the majority of his life.  He studied machining technology at Warren Technical Center and later studied mechanical engineering at the University of Colorado, Boulder.  His hobbies include outdoor activities such as hiking, riding bicycles and rock climbing.  He also enjoys creative expression through metal and glass sculpture.

Harris Kirschner

graduated from the University of Denver in June of 2010, with a major in finance, and a double minor in economics and international studies.  In the same month of graduation he started working for Third Creek Investments.  In late 2011 Harris was made a junior partner of the firm as well as chief compliance officer. 

Harris’ day to day responsibilities with the firm consist of asset management of $67 million, tax planning and preparation, audit work, and financial and management consulting for early venture firms.  Harris works with Dave Straley, president of Third Creek Investments and principal of Dave B. Straley, CPA.  Dave is a CPA with over 30 years of experience, and during that time has been a partner or co-founder of several successful start-up companies.  Dave is also a stakeholder in Spinal Surgical Strategies and is excited to assist with another future prosperous company.