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
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
Number of Employees	51–100 (internal staff); 180+ executive coaches worldwide
Website	https://skylineg.com/

Skyline Group International, Inc. (commonly referred to as Skyline G or SkylineG) is a premier leadership development and executive coaching firm headquartered in Redwood City, California. Founded in 1994, the company has established itself as a leading provider of scalable leadership solutions, built on decades of executive coaching work with some of the most recognized companies in the world.

Skyline Group focuses on developing leaders across the full spectrum of an organization—from first-time managers and high-potential employees to C-suite executives—using a proprietary combination of one-on-one executive coaching, technology-driven coaching platforms, research-validated 360-degree assessments, and data-driven leadership analytics. The company maintains a global network of more than 180 executive coaches, each vetted and selected for strong credentials, deep leadership experience, and the ability to accelerate the success of the leaders they support.

In 2012, Skyline Group introduced its C4X (Coaching for Excellence) platform, a first-of-its-kind scalable coaching solution that blends an integrated 360 assessment, personalized content, comprehensive metrics, and a coach management system with the personalized impact and connection of 1:1 coaching. The C4X suite includes specialized programs: C4L (Coaching for Leadership) for mid-to-senior managers, C4M (Coaching for Management) for new managers, C4H (Coaching for High Potentials), and C4W (Coaching for Women) leaders. Through this technology-enabled approach, Skyline Group aims to deliver consistent, measurable, and high-impact coaching solutions at scale.

The Skyline 360 Assessment, developed in 2001 through a combined research effort by Stanford University, University of Massachusetts, and University of Florida, assesses leaders on 28 empirically validated competencies across four core domains: Leading Self, Leading Others, Leading the Organization, and Managing Implementation/Execution. This research-based assessment is a central element of Skyline Group’s methodology and includes normative benchmark data that enables leaders to compare their results with thousands of other successful leaders.

Skyline Group’s clients represent a broad range of industries and include many well-known 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, Coinbase, and many more. The company has reported a 96% skill development improvement rate among coached leaders and a 100% coaching impact rate, with all leaders indicating increased skill development for their selected competencies. It also reports client ROI estimates averaging $432,000 per leader in one documented program and a 99% participant satisfaction rating in large-scale C4X deployments.

Skyline Group’s founders, Thuy Sindell, Ph.D., and Milo Sindell, MS, are published authors of four books on leadership and employee performance, including Hidden Strengths: Unleashing the Crucial Leadership Skills You Already Have (Berrett-Koehler, 2015). They have been featured in major national media, including Fortune, CNN, Forbes, Business Week, Fox News, NBC, Washington Post, and Investor’s Business Daily. Thuy Sindell is a noted TEDx speaker and has been rated 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

• Skyline Group International on Linkedin
• Skyline Group International on Twitter (X)
• C4X Website
• C4L Website
• Skyline Group International on Crunchbase
• Skyline Group International on The Org
• Skyline Group International on CB Insights
• Skyline Group blog