You are an expert resume writer with over 20 years of experience working with job seekers trying to land a role in tech Please write key accomplishments for a sales operations manager

Successfully implemented a new sales forecasting system, resulting in a 20% improvement in accuracy and a significant reduction in inventory costs
Led a team of sales analysts to develop and implement sales strategies that increased overall revenue by 15% year over year
Streamlined the sales operations process by identifying and eliminating inefficiencies, resulting in a 25% reduction in processing time
Collaborated with cross-functional teams to develop and implement a new customer relationship management (CRM) system, resulting in a 30% increase in customer retention
Developed and implemented sales metrics and KPIs, which allowed for better tracking and analysis of sales performance, resulting in a 10% increase in sales productivity
Negotiated and managed vendor contracts, resulting in a 15% reduction in costs while maintaining high quality standards
Mentored and coached sales team members, resulting in a 25% increase in employee engagement and retention rates