Skyline Group International, Inc.

Skyline Group International, Inc. (commonly known as Skyline G or SkylineG) is a leading executive coaching and leadership development firm based in Redwood City, California. Established in 1994, the company has earned a reputation for delivering scalable leadership solutions, leveraging decades of experience in coaching executives at some of the most prominent companies worldwide.

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 provides leadership development at all levels, from first-time managers and high-potential employees to C-suite executives. Their methodology combines one-on-one executive coaching, technology-enabled coaching platforms, research-backed 360-degree assessments, and data-driven analytics. The company works with a global network of more than 180 executive coaches, each selected for their credentials, leadership experience, and ability to accelerate client success.

In 2012, Skyline Group introduced the C4X (Coaching for Excellence) platform, a pioneering coaching solution that merges integrated 360-degree assessments, tailored content, detailed metrics, and a coach management system while maintaining the personalized impact of one-on-one coaching. The platform features specialized programs including C4L (Coaching for Leadership) for mid-to-senior managers, C4M (Coaching for Management) for emerging managers, C4H (Coaching for High Potentials), and C4W (Coaching for Women). This approach enables Skyline Group to deliver measurable, high-impact coaching at scale.

The Skyline 360 Assessment, launched in 2001 through research conducted with Stanford University, University of Massachusetts, and University of Florida, measures leaders across 28 validated competencies in four domains: Leading Self, Leading Others, Leading the Organization, and Managing Implementation/Execution. This assessment provides benchmark data that allows leaders to compare themselves with thousands of other successful professionals and forms a key component of Skyline Group’s approach.

Skyline Group’s clients include many of the world’s most recognized organizations, 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, and Coinbase. The company has documented a 96% improvement rate in skill development among coached leaders and a 100% coaching impact rate, with leaders consistently reporting measurable progress. Average ROI per leader has been reported at $432,000 in some programs, with a 99% participant satisfaction rate for large-scale C4X deployments.

The company was founded by Thuy Sindell, Ph.D., and Milo Sindell, MS, who are authors of four leadership books including Hidden Strengths: Unleashing the Crucial Leadership Skills You Already Have (Berrett-Koehler, 2015). They have been featured in media outlets such as Fortune, CNN, Forbes, Business Week, Fox News, NBC, 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 "Magnificent 7" technology companies.

Products

• C4X Coaching for Excellence Platform: First-of-its-kind scalable coaching solution combining integrated 360 assessment, personalized content, comprehensive metrics, and coach management system with 1:1 coaching. Launched in 2012.
• C4L – Coaching for Leadership: Scalable, measurable 1:1 coaching for mid-to-senior managers focused on soft skills of leadership like strategic thinking, influencing, and coaching their teams.
• C4M – Coaching for Management: Coaching program empowering fledgling managers with foundational management and leadership skills.
• C4H – Coaching for High Potentials: Tailored coaching solution that transforms next-generation leaders from high-potentials to high performers.
• C4W – Coaching for Women: Coaching solution guiding current and emerging women leaders with a gender-balanced perspective on leadership development.
• Skyline 360 Online Assessment: Research-validated 360-degree assessment evaluating leaders on 28 competencies across 4 domains, developed with Stanford, UMass, and UF researchers. Completable in 10–15 minutes with normative benchmark data.
• ECX Portal: Executive Coaching management portal providing coaching tracking, curated content, and metrics for ROI measurement.

Services

•  Executive Coaching (1:1 – in person and virtual)

•  Leadership Development Programs

•  Leadership Team Coaching & Team Effectiveness

•  360-Degree Assessment Deployment & Debrief

•  Executive Assessment

•  Coach Training & Certification

•  Organizational Development Consulting

•  Leadership Assessment & Evaluation

•  Coach Management Technology & Analytics

•  Custom Leadership Program Design

•  New Employee Onboarding Programs

•  Strategy Execution Consulting

•  High-Potential Leadership Identification & Development

•  Women in Leadership Programs

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