Exceptional Employees For Exceptional Results

Our Vision

E3R is a Service Disabled Veteran Owned Small Business (SDVOSB) founded in 2011 to provide engineering and program management services to the Department of Defense (DoD) and Department of Homeland Security (DHS).

Our Mission

Our company name reflects our business model. We achieve our purpose and business success through hiring and retaining the very best employees in our industry.  E3R employees hold trusted positions providing engineering and programmatic support to government maritime C5ISR programs.


Mark graduated from the US Naval Academy in 1977 with a B.S. in Operations Analysis. He was the Arleigh Burke Honor Graduate and the Combat Systems Honor Graduate of his Basic Surface Warfare Officer class. In 1988 on USS SIMPSON he directed gun battery counter-fire that resulted in the destruction of a hostile gun battery ashore. He then directed the only surface to surface missile duel in US Navy history, sinking a 1000 ton enemy corvette after it fired a Harpoon missile. He graduated from Naval Postgraduate School (NPS) in 1990 with a Master of Science in Engineering Science, specializing in weapon systems engineering. Upon graduation from NPS he became an Engineering Duty Officer and reported to the Aegis Program Office as the Aegis Baseline Engineer, managing the definition, configuration, and software development of Aegis baselines, managing all Aegis development facilities, and managing HIPER-D, a joint DARPA / Navy program to develop High Performance Distributed Supercomputing for US Navy surface combatants. He then worked in a joint Aegis and PEO Theater Air Defense (TAD) advanced technology program.
His next assignment was to PEO Theater Air Defense, initially managing the development of the Advanced Combat Direction System (ACDS) Block 1 (an ACAT 2 program). His responsibilities soon grew to include the development and life cycle support for all non-Aegis shipboard combat systems, including ACDS Block 0 (ACAT 2), NTDS, NTU cruisers, FFG’s, and Ship Self Defense System (SSDS, another ACAT 2 program).
He then served as the PEO TAD lead for the combat system on DDG 1000 before retiring from the Navy in 1997 and accepting a position with Ocean Systems Engineering Corporation (OSEC) in San Diego. At OSEC, he provided full time engineering and programmatic support to PMW 163 (now PMW 120) in the development of advanced technologies for signals intelligence. Under his leadership, OSEC business with SPAWAR and associated Program Executive Offices grew from zero to $22M per year. When QinetiQ North America (QNA) purchased OSEC and ComGlobal Systems, Mark became responsible for the combined OSEC and ComGlobal operations supporting SPAWAR and eventually also for support services to Office of Naval Research (ONR), NAVSEA, and the US Coast Guard.
Leaving QNA, Mark founded E3R in June 2011. Mark is certified as a DAWIA Level 3 Program Manager and was awarded the Assistant Secretary of the Navy Acquisition Reform Award and Bronze Star with Combat “V”.

Mark Tierney


Gary Brister enlisted in the United States Navy in 1982 going on to receive his Commission as a Naval Officer in 1987 upon graduating from the University of Oklahoma with a B.A. (dual degree) in Economics and Political Science.  He went on to graduate from Naval Post Graduate School in 1993 with a M.S. in Information Technology Management (ITM).  As a Surface Warfare Officer his tours in the Navy included: USS NEW ORLEANS (LPH 11); USS LA SALLE (AGF 3); USS TARAWA (LHA 1); Speech Writer within the Public Affairs Office (PAO), Commander Naval Surface Forces Pacific (CNSP); Office in Charge of Landing Craft Utility (LCU) Department, Assault Craft Unit ONE, in charge of 14 LCUs located in San Diego CA and Sasebo Japan; Assistant Functional Integration Manager, Navy Center for Information Technology (CIT) supporting implementation of the Navy’s “Revolution in Training;” Strategic Planning, Combined Forces Command Afghanistan / CJ5 Strategy Planner and Policy Branch Kabul, Afghanistan developing weekly Presidential (POTUS) and bi-weekly Secretary of Defense (SECDEF) briefings; and Director, Officer Professional Development Program, Navy Center for Information Dominance (CID West).  After retiring from the Navy in 2006, he went on to serve in the capacity of a Business Development and Capture Lead for Ocean Systems Engineering (OSEC), QinetiQ North America (QNA) through the acquisition of OSEC, Barling Bay, TASC, and then ENGILITY through acquisition and merger with TASC.  Leaving ENGILITY, Gary became Growth Lead at E3R in 2017. In pursuit of challenging and highly competitive procurements, his win-rates are above the industry average for both new and incumbent work, and he has successfully broken into new markets across DoD. He also continues to actively support the San Diego Chapter of the Armed Forces Communications Electronics Association (AFCEA) President AFCEA San Diego. Gary received numerous awards including the Defense Meritorious Service Medal and the Bronze Star Medal.

Gary Brister

Growth Lead

Lorraine Banner is the Business Manager for E3R. She possesses 25 plus years of experience in operations and financial management.  This expertise is demonstrated in client relations, financial management, recruiting, project management and complex life cycle management support programs aspects of E3Rs operations. Lorraine’s other trusted responsibilities are the management of E3R’s benefit plans, reporting requirements and managing all audits.
Lorraine discovered her natural interests in high school where she enjoyed working with numbers and solving problems.  Her first job was working at a senior services center that provided lunches and networking to retired seniors.  Each subsequent job, new opportunities were selected that would increase her knowledge and continue to develop new skills. While attending college her accounting professor strongly encouraged her to pursue financial accounting positions.  This advice was taken to heart and with each new opportunity she continued to gain depth and expertise in financial matters.  To this day, her philosophy is simple and has served her well “If you work, find your happy place–be passionate and enjoy what you do”.
Lorraine’s career started as a paraprofessional for CPA firm.  Progressing forward, she became a staff accountant for a construction company and was then promoted up to Controller.   Continuing through her career, she worked for several large corporations carrying out and implementing change that propelled these companies to continued financial success.  Prior to E3R, Lorraine worked for QinetiQ North America where she was responsible for the financial management of a division consisting of a large group of government contracts within QNA’s Systems Engineering and Technical Assistance Group.
In her spare time, Lorraine enjoys photography and volunteer work for the United States Marine Corps (USMC) where she serves as an administrator of family support groups.  Lorraine travels to and attends every School of Infantry graduation donating her photography skills to take pictures for families that cannot attend.  As a Colorado native, you can expect to see her cheering on the Denver Broncos.

Lorraine Banner

Business Manager

PJ Perrault received his Commission as a Naval Officer in 1985 and designated a Naval Aviator in 1986. His tours of duty included: Officer In Charge/Air Operation Commander, TACRON 12, USS Essex; Executive Officer, Sea-Based Weapons and Advanced Tactics School Pacific, San Diego; SH-60F/H Maintenance Officer/Department Head, Helicopter Anti-Submarine Squadron Two, San Diego; Command Briefer/Operations Planning Officer, U.S. Pacific Command, Hi.; CAG Staff/ Air Anti-Submarine Warfare Subject Matter Expert, Carrier Air Wing 15, San Diego; SH-60 Flight/NATOPS Instructor, Helicopter Anti-Submarine Squadron Ten, San Diego; Maintenance and Operations Division Officer, Helicopter Anti-Submarine Squadron Four/Sixteen, San Diego. PJ has a B.S. in Aerospace Engineering from New York Polytechnic Institute, Engineering College of New York University. He went on to graduate from U.S. Army Command and General Staff College with a M.A. in Military Operations and Webster University with a M.A. in Computer Resources and Information Management.
After retiring from the Navy in 2005, he went on to serve at Systems Planning and Analysis, Inc., as a Technical Analyst supporting PEO C4I/PMW 120. He was selected as a Senior Science and Technology (S&T) Analyst to support the SPAWAR Chief Technology Officer (CTO) and as the Program Manager provided direct technical support to the CTO for Technology Transition and Transfer services. PJ joined E3R Inc., and as the E3R Program/Portfolio Manager for SSC Pacific he has won the CTO support service contract twice. He provides strategic level leadership, management, mentoring, and oversight for two of E3R’s prime contracts.
He provides technical guidance across program management disciplines and engineering services, facilitates identification of Information Warfare (IW) capability gaps and advancing developing technologies into new warfighting capabilities. He has a keen understanding of emerging technologies and S&T funding initiatives enabling technology development and rapid transition to the warfighter. He is a leader in the development and implementation of the SPAWAR S&T CONOPS and an author of SPAWAR Transition documents. He has extensive experience in processes supporting the Office of Research and Technology applications (ORTA), Cooperative Research and Development Agreements (CRADAs) and Technology Transfer. PJ has received numerous personal awards including Defense Meritorious Service Medal, and Navy Commendation and Achievement Medals.

PJ Perrault

SSC Pacific Portfolio Manager

Dennis Walsh received his Commission as a Naval Officer in 1988 upon graduating from the United Stated Naval Academy with a B.S. in Physical Science. He went on to graduate from Naval Post Graduate School in 1996 with a M.I.S. in Information Technology Management (ITM). As a Naval Aviator his tours included: Deputy Commodore, Chief Staff Officer, Helicopter Strike Maritime Wing, San Diego, CA; Executive Officer, Helicopter Strike Maritime Four One, San Diego, CA; SH-60B Maintenance Officer, Detachment Officer in Charge, Helicopter Squadron Light Four Five, San Diego, CA; SH-60B Training Officer, Helicopter Squadron Light Four One, San Diego, CA; SH-60B Quality Assurance Officer, Helicopter Squadron Light Four Three, San Diego, CA; SH-60B Aircraft Division Officer, Helicopter Squadron Light Four Seven, San Diego, CA ; Flight Student, Naval Flight Training, Pensacola, FL and San Diego, CA. T-34C, TH-57B/C, SH-60B; and Director, President’s Emergency Operations Center, White House Military Office, Washington, D.C. where he developed, implemented and maintained vital and highly sensitive Presidential, Vice-Presidential, National and White House contingency command, control and communication plans involving multi-billion dollar federal, military and civilian assets. After retiring from the Navy in 2007, he went on to serve at SRA International, Inc. as Principal, Director of Operations, San Diego, Program Manager PMW 160 Tactical Networks; Program Manager Joint Tactical Radio System, Network Enterprise Domain (JTRS-NED); SRA Program Manager PMW 150 Tactical C2. He then went on to serve Operations Director Information Warfare San Diego. as the Program/Portfolio Manager SPAWAR Market for Engility Corporation where he provided direct and engaged oversight on seven Prime contracts in support of SPAWAR, PEO C4I, SSC Pacific, SSC Atlantic, and PEO Subs PMS 485 with combined annual revenues exceeding $34M. Mr. Walsh joined E3R as Program/Portfolio Manager SPAWAR Market, providing strategic level leadership, management, mentoring, and oversight of E3R contracts. He provides technical guidance across program management disciplines and engineering services focused in Naval C4ISR, and also has had extensive experience in support of Continuous Process Improvement (CPI) given his extensive studies in Total Quality Leader (TQL) while attending Naval Postgraduate School (NPS), as well as the leadership and support he provided on multiple CPI and Lean Six Sigma (LSS) events while serving as the Prime Contractor’s PM in support of the Professional Support Services (PSS) contracts in SPAWAR/PEO C4I PMW. Dennis has received numerous personal awards including Defense Meritorious Achievement Medal and Meritorious Achievement Medal. Also serves on the Board of Directors for the San Marcos Chamber of Commerce.



Dennis Walsh

SPAWAR Portfolio Manager

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