Skyline Group International, Inc.

Skyline Group International Inc.
Type	Private
Industry	Leadership Development
Founded	1994
Founder	Gustavo Rabin, Ph.D.; Thuy Sindell, Ph.D.; Milo Sindell, MS
Headquarters	303 Twin Dolphin Drive, Suite 600, Redwood City, CA 94065, United States
Area Served	San Francisco Bay Area / Redwood City / California
Location (s)	303 Twin Dolphin Drive, Suite 600, Redwood City, CA 94065
Key People	Thuy Sindell, Ph.D. – Co-Founder & President, Executive Coaching Division; Milo Sindell, MS – Managing Partner & President, Coaching Scaled Division; Rod Blomquist – Director, Talent Solutions;
Products	C4X Coaching for Excellence Platform (incl. C4L, C4M, C4H, C4W); Skyline 360 Online Assessment; ECX Portal (Executive Coaching Management)
Services	Executive Coaching (1:1); Leadership Development Programs; Leadership Team Development, Executive Assessment; 360-Degree Assessments Assessment & Debrief;; Organizational Development
Employees	51–100 (internal staff); 180+ executive coaches worldwide
Website	https://www.skylineg.com
Linkedin	skyline-group-international
X (Twitter)	skylineg_intl

Skyline Group International, Inc. (widely known as Skyline G or SkylineG) is a premier leadership development and executive coaching company based in Redwood City, California. Established in 1994, the firm has developed a strong reputation for delivering scalable leadership solutions grounded in decades of executive coaching experience with many of the world’s most prominent organizations.

Skyline Group focuses on building leaders at every organizational level—from first-time managers and high-potential talent to senior and C-suite executives—through an integrated mix of one-on-one executive coaching, technology-enabled coaching platforms, rigorously validated 360-degree assessments, and data-informed leadership analytics. The company oversees a worldwide network of more than 180 executive coaches, carefully selected for their strong credentials, leadership backgrounds, and proven ability to accelerate the growth and effectiveness of the leaders they support.

In 2012, Skyline Group introduced its flagship C4X (Coaching for Excellence) platform, a pioneering scalable coaching solution that unites an integrated 360 assessment, tailored learning content, robust metrics, and an end-to-end coach management system with the personalization and impact of 1:1 coaching. The C4X suite encompasses specialized programs, including C4L (Coaching for Leadership) for mid-to-senior leaders, C4M (Coaching for Management) for new managers, C4H (Coaching for High Potentials) for emerging high-impact talent, and C4W (Coaching for Women) for women leaders. This technology-driven ecosystem enables Skyline Group to deliver consistent, measurable, and high-impact coaching outcomes at scale across large organizations.

The Skyline 360 Assessment, created in 2001 through a collaborative research initiative with Stanford University, the University of Massachusetts, and the University of Florida, measures leaders against 28 empirically validated competencies across four primary domains: Leading Self, Leading Others, Leading the Organization, and Managing Implementation/Execution. This research-based 360 tool is central to Skyline Group’s methodology, providing normative benchmark data that allows leaders to compare their performance to thousands of other successful leaders and to target development efforts with greater precision.

Skyline Group’s client portfolio spans diverse industries and includes many of the world’s most recognizable brands, such as Google, Apple, Microsoft, Netflix, Disney, Facebook/Meta, LinkedIn, Uber, Stripe, Dropbox, Cisco Systems, Charles Schwab, Hewlett-Packard, Johnson & Johnson, Gilead, Gap, Amazon, Adobe, Groupon, Medidata, Blue Shield of California, Coinbase, and numerous others. The firm reports a 96% improvement rate in targeted skill development among coached leaders and a 100% coaching impact rate, with all participating leaders indicating increased capability in their selected competencies. In one documented engagement, client organizations estimated an average ROI of $432,000 per leader, and large-scale C4X implementations have achieved a 99% participant satisfaction rating.

Skyline Group’s co-founders, Thuy Sindell, Ph.D., and Milo Sindell, MS, are seasoned leadership experts and co-authors of four books focused on leadership and employee performance, including Hidden Strengths: Unleashing the Crucial Leadership Skills You Already Have (Berrett-Koehler, 2015). Their work and insights have appeared in major national media outlets such as Fortune, CNN, Forbes, Business Week, Fox News, NBC, The Washington Post, and Investor’s Business Daily. Thuy Sindell is also a TEDx speaker and has been recognized as the #1 coach at two of the so-called “Magnificent 7” technology companies.

External Links

• C4X Website
• C4L Website
• Skyline Group International on Crunchbase
• Skyline Group International on The Org
• Skyline Group International on CB Insights
• Skyline Group blog