Executive Leadership

Flash Global’s Executive Leadership Team has the vision, passion and expertise of end-to end service supply chains needed to forge innovative solutions that keep the world connected.

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President & CEO

As President and CEO of Flash Global, Sam Mikles is a visionary who led the company’s transformation from a traditional (transaction-based) 3PL to a world-class provider of service supply chain (integrated) solutions. Sam brings a unique blend of 25 years of experience in effectively leading growth, change, and ensuring long-term profitable results across global service and logistics organizations.

As an accomplished and impactful leader, Sam works closely with Flash management to ensure value is realized by customers, employees, partners, and shareholders. He is the leading executive on Flash Global’s Board of Directors, formulating the absolute best-in-class strategies and solutions for some of the world’s largest organizations. He continues to play an active role in leading Flash’s global teams that are strategically positioned around the globe in five regional customer response centers, with 700+ forward stocking locations and 15 multi-client distribution centers found across six continents in 140+ countries.

Sam has a wealth of business acumen and brings over two decades of experience in the global service logistics industry, having designed, built, and implemented global service and support solutions for some of the world’s most recognizable OEMs in the high-tech space. Under his leadership at Hitachi Data Systems, Symantec previously Blue Coat Systems, and Dell previously EMC, Sam was able to guide his team of employees to design, build, and implement global leading-edge service and support solutions that supply superior performance and directly contribute to the company’s revenue acceleration, profitability growth and ultimate customer satisfaction.

As a pioneer in the logistics and supply chain industries, Sam continues to inspire Flash to create innovative solutions that drive impactful results for our customers. Building upon the momentum of the company’s transformational growth, Sam and his executive leadership team continue working to drive value, accelerate profitable growth and improve the service portfolio of the Flash network.


Chief Financial Officer
Greg Castello brings over 20 years of experience in financial and management roles within high-growth and innovative organizations to Flash. Greg’s financial stewardship is guided by his success for a variety of private equity-backed and public companies in both domestic and international business environments. Greg’s leadership has engineered several M&A transactions as well as compliance efforts and revenue generation. Certified as a CPA, he also draws on tenure as CFO Zephyr Communications Inc., and Vaultus Mobile Technologies Inc. Greg’s responsibilities have included all aspects of accounting, finance, and operations.


Chief Sales Officer
John Miller joined Flash in 2008. He is responsible for sales and client development on a global basis. He is a dynamic leader who leverages 20-plus years of critical logistics supply chain expertise to forge successful business development initiatives that increase revenue, market share, and account penetration in domestic and global high-tech markets. John’s proven track record in client account development and his in-depth understanding of client-specific requirements is geared toward the critical parts space and driving opportunities for expansion within that space. Prior to joining Flash, John spent 14 years at Choice Logistics, where his progressive leadership of the sales and marketing teams placed him in senior executive roles — including Senior Vice President of Business Development. John also spent two years with Sonic Air earlier in his career. John’s documented success in client account development and in-depth understanding of client-specific requirements is geared toward the critical parts space and driving opportunities for expansion within that space.


Chief Technology & Marketing Officer
Denise MacDonell, an expert in change management with a proven track record of shaping software applications to drive value-added services to customers, took over as Chief Technology Officer in 2016. Denise’s strategies, vision and ability to leverage technology and people to create a collaborative, efficient environment that always puts the customer first — after all, Flash is in the services business —is crucial to our success. Throughout her 15-year career, Denise has led and worked in turnaround and startup efforts with small, midsize and Fortune 100 companies. As vice president of Product Management for This Technology, Denise led the company’s transformation from an engineering-driven organization into one driven by product and software innovation. That successful evolution led Comcast Corporation to acquire This Technology in 2015 and Denise was appointed VP of Advertising Software, a role she held until coming to Flash.


Chief Customer Officer
Dan Silva has more than 20 years of experience, specifically in service operations and service account management, with previous leadership roles at both OEMs and aftermarket service organizations. Dan has dedicated his career to building and leading global customer support and warranty service operations for multinational organizations. At Seagate Technology, Dan was responsible for establishing the global repair and inventory planning operations that supported enterprise and consumer storage products. At Motorola Mobility, Dan helped build the global repair operating strategy and led key account management teams in all major markets, delivering scalable service models designed to maximize the customer experience. While at Flextronics, Dan led the global account management group supporting consumer and storage verticals in the global services business unit managing growth strategy and P&Ls. At Flash, Dan seeks to build upon that experience, creating a customer-centric organization that leverages data analytics to drive proactive support in partnering with our customers to build best-in-class service supply chain business models the build brand value.


Chief Operating Officer
Kris Michel joined Flash in 2019 as Chief Operating Officer to oversee the company’s operations and lead major business initiatives. With a consistent track record for driving organizational revenue acceleration and EBITDA growth, her career has spanned several high-profile roles from Fortune 100 to turnaround mid-sized companies. In every role she has held – from CFO to COO – Kris has a keen instinct for leading teams to implement and execute effective programs and solutions, coupled with her entrepreneurial spirit and global business perspective.

Throughout her tenured and accomplished career, Kris has frequently provided guidance to large scale change management initiatives, that directly resulted in step-function improvements in operational performance, margin enhancements, and increased revenues. In her past positions, Kris has been a pioneer in creating a global support organization, by transforming call center and customer service center operations, and identifying cost saving measures to aid in an exceptional customer experience.

Kris’ approach to being a successful leader blends her strategic vision with her tenacity and sharp business acumen. She welcomes the opportunities and challenges that await as Flash guides each customer through the ever-changing landscape of the global service supply chain.


Main Line

Customer Response Center (24/7/365)

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