About XLA







Years in Business






Years ISO Certified









Gary Slack

President and Chief Executive Officer

    Gary Slack

    President and

    Chief Executive Officer

    Under Gary’s leadership,       XLA is a provider of services and solutions to the national homeland, international, and defense sectors of the federal government. Gary has more than 35 years of experience in the government contracting industry ranging from professional services, information technology,

    electronics, and platform production. Gary previously served as President and Chief Operating Officer of QinetiQ North America and President of BAE Systems’ U.S. Combat Systems business where he oversaw operations involving more than 9,000 employees across 16 states. Gary holds a Bachelor of Science degree

    in Business Administration (accounting) from Longwood University. He is a member of the corporate advisory board for their College of Business and Economics, serves on the advisory boards of JWF Industries and is a board director of Enterprise Ventures Corporation.


    Nelson McClung

    Senior Vice President and Chief Operating Officer

      Nelson McClung

      Senior Vice President

      Chief Operating Officer

      As XLA’s Chief Operating Officer, Nelson McClung provides day-to-day leadership and general management to the company. Nelson oversees the company’s client portfolio, service delivery, and continued growth and maturity of XLA’s Practice Areas. Nelson’s expertise and leadership is evident in XLA’s development and implementation of solution

      offerings in the areas of cybersecurity, data analytics, business intelligence and capabilities, and global deployments. Nelson joined the firm in 2007, supporting the Department of Homeland Security. Nelson previously worked as a Senior Consultant with Booz Allen Hamilton for the Treasury Department and he held

      multiple positions of increased responsibility supporting TRICARE with Axiom Resource Management. Nelson has a Bachelor of Science from James Madison University and a Master of Science (Information Systems Technology) from George Washington University.

      Cynthia Andrews

      Senior Vice President Business Operations

        Cynthia Andrews

        Senior Vice President

        Business Operations

        Cynthia Andrews has more than 20 years of experience with government contractors, non-profits and commercial organizations. She joined this organization in 2007, working onsite at the Department of Homeland Security, before moving to headquarters in 2008 where she is now responsible for activities

        surrounding contracts and bids and proposals. Additionally, she serves as the XLA ISO Management Representative. Prior to joining XLA she was with Axiom Resource Management where she provided acquisition support to the Department of Defense. Cynthia began her career managing contracts with

        Department of Energy contractors, before joining an     IT start up where she established the contracts and human resource departments. Cynthia received her Bachelor of Arts from the College of Charleston and her JD from George Mason University School of Law. She became PMP certified in 2005.







        Services & Solutions

        XLA consistently delivers high-quality, agile and cost-effective solutions, as proven by consistent growth and repeat customers. We tailor our services in response to our clients’ many multi-faceted challenges. XLA’s services include the following:


        • Law Enforcement Mission Support & Business Capabilities

        • Capital Planning Investment Control

        • Cybersecurity & Information Assurance

        • Systems & Technical Services

        • Call Center Services & Data Analytics

        • Asset Forfeiture

        • Acquisition Strategy, Planning, & Implementation

        • International & Humanitarian Deployment

        • Quality Assurance and Data Verification

        • Human Capital & Background Investigations Lifecycle Services

        • Health Services Administration

        • Business & IT Training

        • Conference Planning (Domestic and International)

        Case Studies



        Documented Solutions



        XLA provides services to its customers as a prime contractor under a variety of Federal Supply Schedules and agency-specific IDIQ and BPA contract vehicles.

        We are always interested in new partnerships and collaborations. If you are interested in potential partnering opportunities, please email BD@xla.com

        For more information about our GSA Schedules and Contract Vehicles, please contact contracts@xla.com


        Careers & Culture


        Our Culture

        XLA promotes a culture of continuous innovation designed to challenge our people, foster professional development, and cultivate community outreach.   Through these efforts, employees are engaged in their work and equipped to deliver superior client support.




        Grow with XLA

        We value our employees through every stage of their career. We actively identify means to enhance personal and professional development through evaluation of our benefit, education, and training programs.

        We are committed to fostering a continual learning environment through:

        • Career-Growth Focused Training

        • Professional Education Reimbursement Program

        • SMART Goal Mentoring Collaboration Program

        • Employee Mobility Program (independent contributor and management tracks available)

        • Corporate partnerships for training and development

        • Interactive Engagement & Retention Programs

        • Career-Development Driven Internship Program



        What’s Going On

        3-08-24 – XLA Featured in WashingtonExec XLA’s Nelson McClung on Delivering Foreign Aid in Challenging Environments Read More …


        2-14-23 – XLA Wins Spot on Commonwealth of Virginia Emergency Management Consulting Services Contract The Commonwealth of Virginia recently issued XL Associates, Inc. a Notice of Award under the Virginia Department of Emergency Management (VDEM) for Emergency Management Consulting Services. XLA will be providing its expertise in five different categories Read More …


        10-01-21 – XLA Awarded DOJ FMASS II BPA Call Orders The Department of Justice recently awarded Call Orders under the Financial Management Assistance Support Services II BPA to XL Associates, Inc., together with its partner Deva & Associates, P.C. Read More …


        1-07-21 – Vulnerability Chaining – Considerations Across the Enterprise Cyber threats are constantly evolving and becoming more sophisticated. The hackers, or bad actors, are getting smarter and more resourceful all the time. Our Red Teamers, ethical hackers, and cyber warriors are aware of many of the tactics used by these malicious actors. Read More …






        XLA Service Awards

        Employee Portal

        Contact Us


        Where We Work in the US

        Washington D.C. Metro Area

        College Park, MD

        Williston, VT

        Farmers Branch, TX

        San Antonio, TX

        Lawton, OK

        Englewood, CO

        Chicago, IL

        Where We Work Internationally

        Boznia and Herzegovina













        United Arab Emirates

        United Kingdom


        Affiliated XLA Websites


        Membership Organizations