A sanitized version of a service control script I wrote at a previous company. It was one of the first scripts I wrote, so please forgive some of the egregious sins like Write-Host ;)

Service Control.ps1

# Created by Colby Bouma
# This script shuts down or starts up services in a specific order
#
# Usage: & '.\Service Control.ps1' [-Environment] {PROD, DEV, TEST} [[-Target_Name] <server short name>] [-Start]
# You must always specify an environment that exists in "Service Control.xml"
# The default is to shut down the specified environment.
# The [-Start] parameter will cause it to start up the specified environment.
# The [-Target_Name] parameter may be used to run this script against 1 specified server, using the <Server> name from "Service Control.xml"
# Example of shutting down DEV: & '.\Service Control.ps1' DEV
# Example of starting up PROD: & '.\Service Control.ps1' PROD -Start
# Example of shutting down the second DEV App server: & '.\Service Control.ps1' DEV APP2
# Example of mixing parameter order: & '.\Service Control.ps1' -Start -Target_Name WEB3 -Environment PROD


###############################################################################
## Setup
###############################################################################

param (
    [string]$Environment = $(throw "PROD, DEV, or TEST is required."),
    [switch]$Start = $false,
    [string]$Target_Name
)

# Import config file
[xml]$Config_File = Get-Content "Service Control.xml"



###############################################################################
## Functions
###############################################################################

function Service_Control {
    param ( [string]$Server_Name, [string]$Service_Name )

    # Retrieve the status of the service
    $Service_Object = Get-Service -ComputerName $Server_Name -Name $Service_Name
    Write-Host $Server_Name $Service_Name - $Service_Object.Status

    # Make sure the startup type of the service is set to Manual
    Set-Service -ComputerName $Server_Name -Name $Service_Name -StartupType Manual

    if ( $Start -eq $false ) {
    # Shutdown mode

        # Stop the service if it is running
        if ( $Service_Object.Status -eq "Running" ) {

            $Service_Object.Stop()
            $Service_Object.WaitForStatus("Stopped", (New-TimeSpan -Seconds 120))

            if ( $Service_Object.Get_Status() -eq "Stopped" ) {

                Write-Host $Server_Name $Service_Name - Stopped

            } else {

                Write-Host Failed to stop $Server_Name $Service_Name, exiting
                Exit $ErrorCode

            }

        }

    } else {
    # Startup mode

        # Start the service if it is stopped
        if ( $Service_Object.Status -eq "Stopped" ) {

            $Service_Object.Start()
            $Service_Object.WaitForStatus("Running", (New-TimeSpan -Seconds 60))

            if ( $Service_Object.Get_Status() -eq "Running" ) {

                Write-Host $Server_Name $Service_Name - Running

            } else {

                Write-Host Failed to start $Server_Name $Service_Name, exiting
                Exit $ErrorCode

            }

        }

    }

    # Echo a blank line
    Write-Host

}



###############################################################################
## Main
###############################################################################

$Services = @()

# Build the Services array
foreach ( $Service in $Config_File.Environment.$Environment.Service.SelectNodes("*") ) {

    $Services += , ($Service.Server,$Service.Name)

}

# Reverse the array if -Start is specified
# Services have to be brought up in reverse of shutdown order
if ( $Start -eq $true ) {

    [array]::Reverse($Services)

}

# Iterate through the services
foreach ( $Service_Name in $Services ) {

    # Skip empty services, these don't exist in the specified environment
    if ( $Service_Name[1] -ne "" ) {

        # If $Target_Name is not blank, only run against specified server
        if ( $Target_Name -ne "" ) {

            if ( $Target_Name -eq $Service_Name[0] ) {

                Service_Control $Config_File.Environment.$Environment.Server.($Service_Name[0]) $Service_Name[1]

            }

        } else {

            Service_Control $Config_File.Environment.$Environment.Server.($Service_Name[0]) $Service_Name[1]

        }

    }

}

Service Control.xml

<!--This is an example config file for 'Service Control.ps1'-->
<Environment>
    <DEV>
        <Server>
            <APP1>DEV-APP1</APP1>
            <APP2>DEV-APP2</APP2>
            <WEB1>DEV-WEB1</WEB1>
            <WEB2>DEV-WEB2</WEB2>
        </Server>
        <Service>
            <CoolApp>
                <Name>CoolApp.Server</Name>
                <Server>APP1</Server>
            </CoolApp>
            <CoolApp>
                <Name>CoolApp.Server</Name>
                <Server>APP2</Server>
            </CoolApp>
            <WebServer>
                <Name>nginx</Name>
                <Server>WEB1</Server>
            </WebServer>
            <WebServer>
                <Name>nginx</Name>
                <Server>WEB2</Server>
            </WebServer>
        </Service>
    </DEV>
    <PROD>
        <Server>
            <APP1>PROD-APP1</APP1>
            <APP2>PROD-APP2</APP2>
            <APP3>PROD-APP3</APP3>
            <WEB1>PROD-WEB1</WEB1>
            <WEB2>PROD-WEB2</WEB2>
            <WEB3>PROD-WEB3</WEB3>
        </Server>
        <Service>
            <CoolApp>
                <Name>CoolApp.Server</Name>
                <Server>APP1</Server>
            </CoolApp>
            <CoolApp>
                <Name>CoolApp.Server</Name>
                <Server>APP2</Server>
            </CoolApp>
            <CoolApp>
                <Name>CoolApp.Server</Name>
                <Server>APP3</Server>
            </CoolApp>
            <WebServer>
                <Name>nginx</Name>
                <Server>WEB1</Server>
            </WebServer>
            <WebServer>
                <Name>nginx</Name>
                <Server>WEB2</Server>
            </WebServer>
            <WebServer>
                <Name>nginx</Name>
                <Server>WEB3</Server>
            </WebServer>
        </Service>
    </PROD>
</Environment>