Ron Klein

Vice President, Advanced Products-West (AP-West)

Ron Klein serves as Vice President of Advanced Products-West. He began at Epsilon Systems in February 2018 as the Chief Technology Officer (CTO) and moved into the role of Chief Information Officer (CIO) in 2019. In 2022, he moved into the role of overseeing the Advanced Products group on the West Coast.

Ron previously worked at Hughes/Raytheon for over 30 years, most recently as Engineering Fellow and Chief Architect. During his career, he acquired a robust knowledge and extensive experience in program planning and the full life-cycle development of large cross-platform programs running on distributed systems that require high availability, stringent performance requirements, and high loads. As a member of the leadership team on a number of diverse projects, Ron gained comprehensive experience in formulating plans, coordinating, and overseeing the development and deployment of small to large projects consisting of single or multiple organizational teams.

Ron holds both Bachelor's and Master's degrees in Computer Science from California State Polytechnic University, Pomona, CA. He is also certified in The Open Group Architecture Framework (TOGAF) and has completed the training from the Raytheon Certified Architect Program (RCAP).

Jim Loiselle

Senior Vice President, Administration

Jim serves as the Senior Vice President of Administration, overseeing Human Resources, Contracts, Purchasing, Security, Information Technology, and Facilities. He joined Epsilon Systems in 2019 as the Director of Contracts and has over 20 years of defense industry experience.

Jim is a strong believer in the “Servant Leadership” philosophy where the leader shares power, puts the needs of employees first, and helps people develop and perform as highly as possible. He also embraces the concept that “Learning by Doing” is the best way to tackle both the opportunities and challenges that come with running the day-to-day operations of any type of entrepreneurial business.

As a San Diego native, Jim loves a wide variety of outdoor activities that are ideally suited to the Southern California climate including hiking, biking, paddleboarding, and strength training. He enjoys frequent trips up the California Coast with his family which includes his wife, daughter, and two golden retrievers. As an avid music buff, Jim loves attending outdoor concerts and music festivals, especially classic and modern rock.

Prior to entering the defense industry, Jim served as an officer in the U.S. Navy and received his commission through the Naval Reserve Officers Training Corps at the University of San Diego.

Jim holds a Bachelor’s Degree in Business Administration from the University of San Diego, a Master of Science Degree in Business Administration from San Diego State University (SDSU), and is a National Contract Management Association (NCMA) Certified Professional Contract Manager.

Away from work, Jim is a part-time faculty member at SDSU’s Global Campus where he teaches contract management courses in support of its professional certificate program which he believes is the perfect platform to share his “Servant Leadership” philosophy and “Learning by Doing” approach.

Alyx Schmidt

Senior Vice President, Finance

Alyx Schmidt serves Epsilon Systems as Senior Vice President of Finance. Alyx began her career at Epsilon Systems in 2007, serving in positions including Business Development Associate for the Chief Operating Officer, Program Manager for the company’s largest contract, and Corporate Financial Manager for the Chief Financial Officer. Most recently, Alyx served as the Director of Finance responsible for oversight of the financial planning and analysis as well as the rates and budgets functions at Epsilon Systems.

Alyx is a California native. However, her adult education started abroad with a certificate in International Protocol from Institut Villa Pierrefeu in Glion, Switzerland. Upon returning to the U.S., she obtained her undergraduate degree in International Business, followed by a Masters of Business Administration with a concentration in Finance from San Diego State University.

Throughout her career, Alyx continued to dedicate herself to the defense industry through volunteer work at organizations such as the San Diego Military Advisory Council (SDMAC) and National Defense Industrial Association (NDIA). Today, Alyx serves a Past President of the San Diego Chapter of NDIA.

Dina Zumwalt

Vice President, Marketing and Proposals

Dina Zumwalt serves as Vice President of Marketing and Proposals. She began at Epsilon Systems in 2019 as the Marketing Research and Proposal Center (MAPCEN) manager. She has over 20 years of defense industry experience.

Prior to joining Epsilon Systems, Dina served as a Senior Capture and Proposal Manager for Trident Proposal Management in San Diego, where she led many proposal efforts in support of major clients. Prior to joining Trident, Dina worked for McKean Defense Group in San Diego as the Integrated Project Team Development (IPTD) West Coast Project Manager, overseeing IPTD facilitators in the San Diego, Pacific Northwest, and Hawaii regions and the administrative coordinator. Prior to McKean Defense Group and after leaving the U.S. Navy, Dina was employed by Amsec LLC, serving as the Carrier Team One Deputy Program Manager in Coronado, CA.

While serving as a U.S. Navy Surface Warfare Officer, Dina held multiple positions including Course Coordinator and Instructor, Expeditionary Warfare Training Group, Pacific (EWTGPAC); Computer and Communications Officer, Expeditionary Strike Group Three (ESG 3); and Auxiliary Engineering Officer, USS Tarawa (LHA 1).

As the leader of Epsilon System’s proposal development, Dina is not only a consummate team leader, but also a team player. She sees herself as an “orchestra conductor” and leads by example, but also steps in to assist with any area that needs focus or extra time and attention to detail. She understands that it’s the team that gets things done, especially in a tight timeline, and she works to provide the guidance and know-how to develop winning proposals.

Dina earned a Bachelor of Science in Economics from the U.S Naval Academy and a Master of Science in Global Leadership from the University of San Diego. She holds certificates in Global Strategy & Management and Project Management and is Project Management Professional (PMP) certified.

A native of Walnut Creek, CA, she spends her free time with her family. She is married with three busy boys and two German Shepherd rescue dogs. She is actively involved with her sons’ school and her church community, including volunteering with a local children’s food charity. She enjoys traveling, skiing, swimming, and visiting with friends.

Janeece Tanaka

Vice President, Human Resources

Janeece Tanaka serves as Vice President of Human Resources (HR) at Epsilon Systems. She joined the company in 2005 and has served various roles in all areas of HR. In 2019, Janeece was appointed Director, HR, and was promoted to Vice President, HR, in 2024. She currently leads the HR Team as they provide essential support to all employees and managers across the company. Her roles and responsibilities include Compensation & Benefits, Recruiting & Hiring, Employee Relations, Corporate Insurance, Labor Law, and other Legal Compliance.

Janeece earned her Bachelor’s Degree from San Diego State University, a Master’s Degree in Industrial Organizational Psychology from Alliant International University – San Diego campus, and is a certified Senior Professional in Human Resources (SPHR).

Steve Martin

Senior Vice President, Epsilon C5I

Steve Martin is the Senior Vice President of Epsilon C5I. In this role, Steve oversees DoD-cleared engineers and intelligence professionals who provide innovative products, services, and solutions to federal, defense, and intelligence customers.

Prior to joining Epsilon Systems, Steve served in leadership positions at a variety of both large and small defense companies and currently serves as Committee Lead for the San Diego Chapter of the National Defense Industrial Association (NDIA).

Before entering the defense industry, Steve served as a Surface Warfare Officer in the U.S. Navy and received his commission through the Naval Reserve Officers Training Corps at Vanderbilt University.

Steve holds a Bachelor’s Degree from Vanderbilt University, a Master of Business Administration from The University of Texas, and is a Project Management Institute Certified Project Management Professional.

Mike Fabel

Executive Vice President, Technology and Technical Services

Mike Fabel, a U.S. Navy and defense industry veteran, serves as the Executive Vice President of Epsilon Systems’ Technology and Technical Services. In this role, he oversees Mission Services, Epsilon C5I, Advanced Products, and Technology Solutions.

Prior to joining Epsilon Systems, Mike was Site Executive for the Raytheon facility in San Diego, CA. During his two-decade tenure with Raytheon, he has served in various roles, including engineering, program leadership, business capture lead, as well as Senior Program Manager for the U.S. Navy's Ship Self Defense System (SSDS) program, responsible for development, delivery, and integration of the combat management system used on aircraft carriers and amphibious ships. Part of Raytheon's strategic business development group, Mike led teams responsible for developing and proposing solutions for the United States military and its global allies, providing integrated systems, installation, and training support for maritime surface and subsurface warfare, command and control, combat systems, navigation, and ship integration for naval combatants. He also served as capture manager and program manager for integrated combat systems opportunities with the U.S. Navy, where he led the development of multiple strategic partnerships across the industry to create solutions for international combat systems.

Before joining Raytheon, Mike served for six years as a nuclear-trained submarine officer in the U.S. Navy, completing multiple deployments to the western Pacific. He continued to serve as a reserve submarine officer while working for Raytheon, supporting underway Submarine Advisory Teams and submarine rescue until he retired from the Navy in 2012.

Mike holds an MBA from Chaminade University in Honolulu, HI, and a bachelor’s degree in mechanical engineering from University of California, Santa Barbara.

During his free time, Mike enjoys road trips with his family and working on classic cars and motorcycles. He is active with the San Diego Navy League and helps his daughter raise puppies as a volunteer with Guide Dogs for the Blind.

John Riley

Senior Vice President, Mission Services

John Riley is the Senior Vice President of Mission Services. John joined Epsilon Systems in 2013 and has served as the Southwest Account Manager and the Professional Services Group General Manager, overseeing administrative and technical program management of professional services contracts. Prior to joining Epsilon Systems, he was a Senior Engineer with McKean Defense Group where he led efforts in support of Commander Navy Regional Maintenance Command (CNRMC) in identifying manpower technical capability and capacity requirements. A former Surface Warfare Officer, John retired from the Navy as Captain (O-6) in May of 2010, after completing a 30-year Naval career. John’s Navy career included commanding the USS Aries (PHM 5), USS Curts (FFG 38) and USS Tarawa (LHA 1), and he was the inaugural Commander of the Littoral Combat Ship (LCS) Class Squadron.

John received his commission through Naval Reserve Officer Training Corps (NROTC) at Tulane University and is a graduate of Naval Post Graduate School earning a Master’s Degree in Telecommunications Systems Management. Certified by the Project Management Institute, he is a Project Management Professional (PMP) and a lifetime member of the Surface Navy Association (SNA).

Brant Robinson

Vice President, Technology Solutions

Brant Robinson is the Vice President, Technology Solutions that provides engineering, technical, environmental, and administrative support to customers in the western United States and in the Pacific. He joined Epsilon Systems in September, 2018.

Prior to joining Epsilon, Brant served in the U.S. Navy as an officer in the submarine force performing various leadership roles in operations, engineering, and training. After leaving active duty, he designed and built electrical and alternative energy systems for various commercial and non-profit organizations. Brant retired as a Commander from the Navy Reserves in 2022.

Brant holds Bachelor’s Degrees in Communications and Physics and a Master’s Degree in International Relations. He is a member of the Naval Submarine League.

Nathan Sharadin

Vice President, Mission Services

As Vice President of Mission Services for the Technology and Technical Services group of Epsilon Systems, Nathan Sharadin oversees the company’s engineering and technical services in a variety of locations including Norfolk and Newport News, VA; San Diego, CA; Mayport, FL; Las Vegas, NV; Albuquerque, NM; and Newport, RI.

Nathan has significant project management experience for engineering and technical DoD contracts as well as corporate portfolio management and strategic planning. Prior to joining Epsilon Systems, he supported large and small businesses on various surface Navy maintenance and modernization programs. As an employee of McKean Defense Group, Nathan supported the Program Management Office (PMO) for the Surface Maintenance Engineering Planning Program (SURFMEPP) and Commander Navy Regional Maintenance Center (CNRMC). In addition, he provided business operations, technical, and management oversight for Lockheed Martin Corporation for over eight years, supporting programs such as the Ready Reserve Force (RRF) Logistics overhaul program, Program Executive Office Integrated Warfare Systems 5 (PEO IWS5) AN/SQQ-89 A(V)15 Integrated Logistics Support (ILS) and Installations, and Enterprise-Wide Contractor Support Services (EWCSS).

Nathan earned a B.S. in Business Education from the Virginia Polytechnical Institute and Virginia Tech, and a Master’s in Business Administration (MBA) from Old Dominion University.

Keith Cole

Vice President, Advanced Products-East (AP-East)

Having spent more than 30 years in repair and overhaul support on military aviation platforms, and combining that with personal humility and mountains of lessons learned, Keith recognized his true passion as a proactive leader who understands team work is the primary engine to long-term sustainability. The whole is better than the sum of its parts, as they say. Working with others to achieve a common goal has been his longstanding guiding principle.

In this role, Keith directs the company’s product development and sales of all manufacturing lines, including aviation ground support equipment, aircraft launch and recovery equipment, racks and consoles, and build-to-print box assemblies.

Keith served four honorable years in the U.S. Navy working in Aviation, and more than two decades with Northrop/Grumman Aircraft Systems performing maintenance, modifications, and overhaul on F14 and E2C aircraft. He has led teams throughout the United States, Japan and the UAE, and received numerous letters of appreciation and a leadership award.

Keith holds a degree in Professional Aeronautics from Embry-Riddle Aeronautical University. He has also obtained a Certificate in Project Management, PMI® from Boston University Corporate Education Center.

He has attended a variety of seminars, military schools, and professional skill enhancement programs embracing many topics: Overhaul Maintenance, Computer Systems, AutoCAD, Effective Team Leadership and Motivation, and Lean Six Sigma practices.

An avid blood and platelet donor for the Red Cross, Keith enjoys exercise, outdoor activities, such as swimming, running or long walks with his wife, Cherie. Having previously coached youth sports for both his daughters, he continues to convey that same passion with his grandchildren. Alongside his wife, he is dedicated to time spent with his daughters and their families.

John Murdock

Senior Vice President, Business Systems

John is driven every day by the duty to exceed our customers’ expectations and the duty we have to the welfare of our employees and their families. As an employee-owned company, we are all in this together and John strives every day to make a difference in the lives of our customers and employees.

John has over 30 years of experience in acquisition and program management, including extensive experience and technical knowledge in program management, contract and financial management, proposal preparation and evaluation, earned value management, value stream mapping, supply chain management, operational logistics, and graduate-level instruction/facilitation. With his 18 years of experience at Epsilon Systems, John sets his focus on the development of the company’s next generation. Having served as an adjunct professor at various colleges for years, he takes the opportunity to share his experience and give back to the organization that took a chance on him years ago.

John is a retired Naval Supply Corps Officer, having served onboard a submarine, cruiser, aircraft carrier, and a deployment supporting the U.S. Army in Bosnia. He holds degrees in economics from the University of Buffalo, masters from the Naval Post Graduate School and is a Certified Professional Contracts Manager (CPCM). John is a member the Tidewater Community College Management Advisory board. He resides in Virginia Beach, devoted to his family and especially his two grandchildren.

Rosemarie Rozarto

Vice President, Business Development

Rosemarie Rozarto has over 30 years of experience in government procurement, contracts, business development, capture planning and execution, and proposal management. She has been an Epsilon Systems employee since 2008, originally as the Business Development Manager, and is currently serving as the Vice President of Business Development for Fleet Sustainment.

Rosemarie maintains cordial, continual relationships with key clients to monitor programs and ensure customer satisfaction. She believes in the value of talking to customers routinely, touching base informally to learn about potential future opportunities and identify any weaknesses in current program communication lines. This provides program managers the ability to reach out and address emerging concerns before they become formal issues. This regular, face-to-face communication ensures Epsilon Systems stays aligned to best meet these customers’ current and future needs.

Skilled at proposal management and marketing strategies, Rosemarie is a strategic thinker who researches, tracks, and monitors a wide variety of ship modernization and repair opportunities with new and existing customers. She is well known in the ship modernization industry and uses her vast network to identify future opportunities that fit within the Fleet Sustainment capabilities.

Prior to joining Epsilon Systems, Rosemarie served as Director of Business Development for General Scientific Corp., an 8(a) company, and Director of Procurement at Xenotechnix Corp., an 8(a) AIT startup that grew to over 440 employees in San Diego and Norfolk, VA.

Larry Ingels

Senior Vice President, Modernization & Engineering Sector

Larry Ingels joined Epsilon Systems in 2014, and serves as Senior Vice President of the company’s Modernization & Engineering Sector. Larry is responsible for Modernization and Alteration Install Team (AIT) operations, Submarine-SUBSAFE, and Hyperbaric Programs as well as execution of Epsilon Systems’ contracts and task orders supporting MARMC, NAVSEA, SPAWAR, NAVAIR, NSWC, NAVFAC, and numerous commercial customers. Larry has over 40 years of management, supervision, and technical hands-on experience and brings an extensive understanding of Navy (and commercial) ship and submarine repair, maintenance, overhaul, and modernization.

Prior to joining Epsilon Systems, Larry was the Senior Program Manager for Submarine Programs at General Dynamics Information Technology from 2012 to 2014, where he planned and executed all submarine program work including overhaul, repair, modernization, and field changes for submarine sail systems.

In 2001, Larry joined Oceaneering International as a Project Manager for high-data-rate antenna installations on all classes of U.S. Navy submarines. He advanced to Production Manager overseeing all submarine projects worldwide and later to Director of Submarine and Manufacturing Programs with responsibility for Quality Control on SUBSAFE and shop repair and manufacturing work.

Larry began his career in 1981 at Newport News Shipbuilding (NNS) as an outside machinist supporting numerous new construction, overhaul, and modernization programs on ballistic missile and fast-attack submarines and aircraft carriers. He also worked with the Fleet Support and Virginia-Class Advanced Planning Group and was a member of the NNS Tiger Team executing projects worldwide.

Tom Hill

General Manager, Southeast Region – Jacksonville

Tom Hill joined Epsilon Systems in December, 2020 as the General Manager – Southeast Region. His primary duties include oversight of the daily activities, business development, and strategic planning for the Southeast Region. He has been a key component of our preparations for the LCS MACMO contract and our recent “on-boarding” onto the Surface Combatant MACMO contract in Jacksonville, FL. Tom has over 40 years of experience in the ship construction, modernization, and repair business.

Prior to joining Epsilon Systems, Tom was employed by General Dynamics – NASSCO as Project Manager. His assignments included modernization and upgrade of USS Mason DDG-87 (Norfolk) and repair and upgrades on USS Iwo Jima LHD-7 (Jacksonville).

Tom began his career as a “helper” at Atlantic Marine, Inc. in 1981 and worked for them in various roles including Quality Assurance, Non-Destructive Test Inspector, Superintendent, Project Manager, and Division Manager of the Mayport Naval Station facility (pre-BAE Systems) over a period of nearly 20 years. After leaving Atlantic Marine, he started his own consulting company with a variety of clients including Colonna’s Shipyard, Maritime Design, Environmental Recovery, and more.

Jim Achenbach

Senior Vice President, Ship Repair Sector

Jim Achenbach is the Senior Vice President of the Ship Repair Sector. In this role, Jim oversees the company’s ship repair business and he also acts as General Manager of the Southwest Region in San Diego and Hawaii. Before this appointment, Jim served as our Director of Operations for Fleet Sustainment San Diego.

Prior to joining Epsilon Systems, Jim served in leadership positions at BAE Jacksonville, Mayport, and San Diego. Before entering the defense industry, he served in a number of positions as a career Civil Servant for the U.S. Navy with his last position as Executive Director, Southwest Regional Maintenance Center.

Jim holds a Bachelor’s Degree from New York Maritime and is a licensed Chief Engineer in the United States Merchant Marine.

Jim Achenbach

General Manager (Acting), Southwest Region – San Diego & Hawaii

Jim Achenbach is the Senior Vice President of the Ship Repair Sector. In this role, Jim oversees the company’s ship repair business and he also acts as General Manager of the Southwest Region in San Diego and Hawaii. Before this appointment, Jim served as our Director of Operations for Fleet Sustainment San Diego.

Prior to joining Epsilon Systems, Jim served in leadership positions at BAE Jacksonville, Mayport, and San Diego. Before entering the defense industry, he served in a number of positions as a career Civil Servant for the U.S. Navy with his last position as Executive Director, Southwest Regional Maintenance Center.

Jim holds a Bachelor’s Degree from New York Maritime and is a licensed Chief Engineer in the United States Merchant Marine.