Management Team

Mark Gross - Founder & CEO

Since 2003, Oak Grove founder and CEO, Mark Gross, has grown a successful business practice serving both the federal and commercial sectors. He has guided the company to numerous achievements including the 2007 DoD Inaugural SDVOSB Achievement award. In addition, Mark's leadership led Oak Grove to be named the 2008 Mid-sized Company of the Year by the North Carolina Technology Association. Before founding Oak Grove, Mark was a U.S. Army enlisted soldier. He continued his public service under the United States Department of Justice (DOJ) Honors Program, Antitrust Division. There, Mark improved relations between regulatory agencies, and was presented the Assistant Attorney General (AG) (Ann Bingaman) Award in 1993 and 1994 and the AG (Janet Reno) Award in 1995.

Mark is a passionate supporter of Veterans, as well as Entrepreneurs, having mentored over 15 successful companies over the years.  He served as legal editor of Veterans Benefits Manual - An Advocates Guide to Veterans Benefits and is active within the NDIA and AFCEA. He is a founding member of the American Legion, National Economic Committees Small Business Task Force. Mark was also appointed to serve on the U.S. Small Business Administration's (SBA) Veterans Advisory Committee, advising both the White House and the Congress on issues affecting veteran businesses. He attended the University of Maryland, Hanua Germany as well as The Catholic University of America in Washington, DC.

Mark is active in multiple charities to include the Special Forces Association, where he is an honorary Life Member; The FBI Citizens Academy, where he is a 2015 graduate; YMCA, where he serves on the board of directors; the MARSCO Foundation; US Veterans Corps; Edinboro University Wrestling; Wolfpack Wrestling Club; Washington Irish RFC; American Legion; Green Beret Foundation; Oasis Group; Task Force Dagger Foundation; Harriman-Miller (Stan the Man Golf Tournament) as well as surrounding local law enforcement. 

Moner Attwa - Executive Vice President and Chief Financial Officer

For more than 10 years, Mr. Attwa has planned, managed, and guided companies toward their financial and operational goals. Moner brings a reputation of strategic growth and inclusive leadership to his role as CFO/COO with the Oak Grove team. He is engaged in integrating geographically dispersed teams, streamlining communication across business units, and managing growth as Oak Grove graduates to a mid-sized business. Previously working and consulting for companies that support the State Department, DHS, DoD and other Federal Government agencies has allowed Mr. Attwa to hone his extensive knowledge administering and managing contracts and providing financial management and operational support in efforts to deliver services on numerous IDIQ’s vehicles, GWACS, and Contracts. Some of the larger IDIQ’s he helped support were CAAS IV Contract Advisory and Assistance Services with a ceiling of $4.9 Billion and eFast with ceilings of $2.5 Billion. Moner has managed numerous prime contracts and worked with companies in the executive role that have had revenues in excess of $120M. His financial experience also includes consulting with a large global based asset management group; His understanding of FAR, DFAR, CAS, and his executive support of helping guide numerous companies thru DCAA system audits and Incurred cost submission is vital. Mr. Attwa holds a Bachelors of Science in Accounting from Virginia Commonwealth University and is a Certified Public Accountant (CPA) in the State of Virginia, Maryland, and DC. He is also Certified Fraud Examiner (CFE) and a Certified Global Management Accountant (CGMA). He has received his certificate in government contracting from George Mason University.

David Shellenberger - Vice President, Law Enforcement & National Security

As VP, David sets the company’s strategic direction relevant to Law Enforcement and National Security training. David brings more than 30 years of organizational, management, and Federal Law Enforcement experience to include over 25 years with the Federal Bureau of Investigation’s (FBI) Hostage Rescue Team (HRT) to the company. As a Senior Manager of the Federal Bureau of Investigation, David brings an extensive background in high risk, complex, government, and private sector environments. He is experienced in leading teams to successful outcomes in security, criminal and counterterrorism cases. He has expertise in standing up command centers, tactical operations, state of the art security, leading financial kidnapping crimes, international fraud, and domestic terrorism bombing cases. David has nearly three decades of experience in Federal Law Enforcement Special Mission Units, including service with the FBI HRT. As Unit Chief, David was responsible to the FBI for leadership, training, mentorship and implementation of policies and procedures for the U.S. Federal Law Enforcement’s most elite unit. He served as the subject matter expert on operational matters and command representative on federal law enforcement policy boards. He has been the highest-ranking residing Tactical Commander on several high profile assignments, both CONUS and OCONUS. David has participated in multiple U.S. Federal Law Enforcement operations over the last 25 years. He was awarded the Attorney General’s Special Appreciation Award, FBI’s Medal of Bravery, U.S. Department of Justice Certificate of Merit, FBI Agent Association J. Edgar Hoover Memorial Award for Valor, and the FBI Agent Association Award of Excellence. David holds a Bachelor of Arts degree in Business Administration from Rollins College, Winter Park, Florida. David currently retains a TS/SCI clearance.

Bill Ingram - Senior Military Consultant

LTG(R) Bill Ingram joined Oak Grove Technologies as a Senior Military Consultant in October 2015 after 43 years of distinguished service in the United States Army and the North Carolina National Guard.  After serving two years as an enlisted soldier, Bill received his commission in 1972 as the Distinguished Graduate of the Officer Candidate School, North Carolina Military Academy at Fort Bragg, North Carolina. In addition to the U.S. Army War College, his military education includes specialized courses in joint firepower control, anti-terrorism, electronic warfare, national and international security, and strategic leadership development. He is a graduate of North Carolina State University earning a Bachelor of Science degree in Textile Chemistry.

A career infantry officer, he commanded at the platoon, company, and battalion level in the 1st Battalion, 119th Infantry, North Carolina Army National Guard.   Bill also served in staff positions as the S-3 Air, S-3, and S-4, 1st Battalion, 119th Infantry and as Assistant S-3, 30th Infantry Brigade.  He later served as Rear Operations Officer and then Commander, 139th Support Detachment.  In 1997, Bill first deployed to the Balkans as Commander, Task Force Pershing, Camp Sava North, Slavonski Brod, Croatia.  He then commanded the 60th Troop Command in Rocky Mount, NC, before returning to the Balkans in 1999 to serve as Chief of Staff, United Nations Preventative Deployment (UNPREDEP), Skopje, Macedonia. Following the UN mission, he remained in the Balkans and commanded Task Force Sabre (1st Infantry Division) in Petrovec, Macedonia, the staging base for U.S. operations in Kosovo.

In July 2001, Bill was appointed The Adjutant General, North Carolina, where he oversaw the largest mobilization of the North Carolina National Guard since World War II.  From 2006 to 2010, while still serving as the Adjutant General, Bill also served as a member and subsequently as chairman of the Army Reserve Forces Policy Committee.  In October 2010, he was called to the Pentagon to serve as special assistant to the Vice Chief of Staff, U.S. Army.

In his last assignment, Bill assumed the duties of Director, Army National Guard in November 2011.  As Director, he was responsible for the formulation, development and implementation of all programs and policies affecting the Army National Guard, a force of more than 350,000 Citizen-Soldiers in the 50 states, three territories and the District of Columbia. 

Bill’s tactical, technical, and strategic expertise coupled his proven ability to direct people, programs, and diverse teams make him a valuable consultant who understands the customer’s requirements and provides valuable strategic guidance to our corporate staff and business units.

Wayne Detwiler - Vice President, Defense Operations

Wayne Detwiler joined the Oak Grove Technologies Team in June 2016 and focuses on our Defense Business growth and portfolio management.  Wayne has served in large, public, defense corporations at the Director and Vice President levels, and has successfully managed accounts in all aspects of profit & loss, growth, business development, program management, strategy, annual operational planning, and campaign planning. His accounts have been at the $100M plus size and included diverse operational, training, education, and international portfolio attributes.

Prior to working in defense contracting, Wayne served as a career operational Army Officer for 28+ years in a myriad of positions, including operational, command and advisory capacities.  Wayne holds a Bachelor of Science degree in General Engineering from the United States Military Academy at West Point, New York, graduating in 1983.  He also holds a Masters of Arts degree in National Security from the Naval War College, a Masters of Science degree in National Security and Strategic Studies from the National War College and is a graduate of the Defense Language Institute, having successfully completed Dutch Language Training.