FAIRFAX, Va.--(BUSINESS WIRE)--ECS Federal, LLC, a leading provider of technology solutions and engineering services to the United States Federal Government, announced today that it has partnered with and secured a significant financial investment from Lindsay Goldberg LLC. Lindsay Goldberg, a private investment firm with approximately $10 billion of equity capital, specializes in making long-term investments in family-owned businesses and collaborating with management teams to achieve long-ter